diff --git a/app/admin/cities.rb b/app/admin/cities.rb
index 2cbc254..5698962 100644
--- a/app/admin/cities.rb
+++ b/app/admin/cities.rb
@@ -10,7 +10,7 @@ ActiveAdmin.register City do
   #
   # Uncomment all parameters which should be permitted for assignment
   #
-  permit_params :name, :country, :latitude, :longitude, :active, :priority, :timezone, :region, :last_weather_fetch, :last_image_generation, :slug
+  permit_params :name, :country_id, :latitude, :longitude, :active, :priority, :timezone, :last_weather_fetch, :last_image_generation, :slug
   #
   # or
   #
@@ -24,11 +24,13 @@ ActiveAdmin.register City do
     selectable_column
     id_column
     column :name
-    column :slug
+    column :country
+    column :region do |city|
+      city.region
+    end
     column :latitude
     column :longitude
     column :active
-    column :created_at
     actions
   end
 
@@ -39,7 +41,6 @@ ActiveAdmin.register City do
     f.inputs do
       f.input :active
       f.input :name
-      f.input :country, as: :String
       f.input :latitude
       f.input :longitude
       f.input :priority
diff --git a/app/admin/countries.rb b/app/admin/countries.rb
new file mode 100644
index 0000000..46258ca
--- /dev/null
+++ b/app/admin/countries.rb
@@ -0,0 +1,36 @@
+ActiveAdmin.register Country do
+  # See permitted parameters documentation:
+  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
+  #
+  # Uncomment all parameters which should be permitted for assignment
+  #
+  permit_params :name, :code, :region_id
+  #
+  # or
+  #
+  # permit_params do
+  #   permitted = [:name, :code, :slug, :region_id]
+  #   permitted << :other if params[:action] == 'create' && current_user.admin?
+  #   permitted
+  # end
+  index do
+    selectable_column
+    id_column
+    column :name
+    column :code
+    column :region
+    column :cities_count do |country|
+      country.cities.count
+    end
+    actions
+  end
+
+  form do |f|
+    f.inputs do
+      f.input :region
+      f.input :name
+      f.input :code
+    end
+    f.actions
+  end
+end
diff --git a/app/admin/regions.rb b/app/admin/regions.rb
new file mode 100644
index 0000000..494ea4c
--- /dev/null
+++ b/app/admin/regions.rb
@@ -0,0 +1,29 @@
+ActiveAdmin.register Region do
+  # See permitted parameters documentation:
+  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
+  #
+  # Uncomment all parameters which should be permitted for assignment
+  #
+  permit_params :name, :code
+  #
+  # or
+  #
+  # permit_params do
+  #   permitted = [:name, :code, :slug]
+  #   permitted << :other if params[:action] == 'create' && current_user.admin?
+  #   permitted
+  # end
+  index do
+    selectable_column
+    id_column
+    column :name
+    column :code
+    column :countries_count do |region|
+      region.countries.count
+    end
+    column :cities_count do |region|
+      region.cities.count
+    end
+    actions
+  end
+end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 0d95db2..1ae736c 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,4 +1,11 @@
 class ApplicationController < ActionController::Base
   # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
   allow_browser versions: :modern
+  before_action :set_locale
+
+  private
+
+  def set_locale
+    I18n.locale = params[:locale] || I18n.default_locale
+  end
 end
diff --git a/app/models/city.rb b/app/models/city.rb
index cb86220..28b42b9 100644
--- a/app/models/city.rb
+++ b/app/models/city.rb
@@ -1,6 +1,7 @@
 class City < ApplicationRecord
   extend FriendlyId
   friendly_id :name, use: :slugged
+  belongs_to :country
 
   has_many :weather_arts, dependent: :destroy
 
@@ -8,6 +9,20 @@ class City < ApplicationRecord
   validates :latitude, presence: true
   validates :longitude, presence: true
 
+  delegate :region, to: :country
+
+  def to_s
+    name
+  end
+
+  def localized_name
+    I18n.t("cities.#{name.parameterize.underscore}")
+  end
+
+  def full_name
+    "#{name}, #{country}"
+  end
+
   def should_generate_new_friendly_id?
     name_changed? || super
   end
diff --git a/app/models/country.rb b/app/models/country.rb
new file mode 100644
index 0000000..c4a5490
--- /dev/null
+++ b/app/models/country.rb
@@ -0,0 +1,26 @@
+class Country < ApplicationRecord
+  extend FriendlyId
+  friendly_id :name, use: :slugged
+
+  belongs_to :region
+  has_many :cities, dependent: :restrict_with_error
+
+  validates :name, presence: true
+  validates :code, presence: true, uniqueness: true
+
+  def to_s
+    name
+  end
+
+  def localized_name
+    I18n.t("countries.#{code}")
+  end
+
+  def self.ransackable_attributes(auth_object = nil)
+    [ "code", "created_at", "id", "id_value", "name", "region_id", "slug", "updated_at" ]
+  end
+
+  def self.ransackable_associations(auth_object = nil)
+    [ "cities", "region" ]
+  end
+end
diff --git a/app/models/region.rb b/app/models/region.rb
new file mode 100644
index 0000000..79ce024
--- /dev/null
+++ b/app/models/region.rb
@@ -0,0 +1,28 @@
+class Region < ApplicationRecord
+  extend FriendlyId
+  friendly_id :name, use: :slugged
+
+  has_many :countries, dependent: :restrict_with_error
+  has_many :cities, through: :countries
+
+  validates :name, presence: true
+  validates :code, presence: true, uniqueness: true
+
+  def to_s
+    name
+  end
+
+  def localized_name
+    I18n.t("regions.#{code}")
+  end
+
+  # 模型中允许被搜索的关联
+  def self.ransackable_associations(auth_object = nil)
+    [ "countries", "cities" ]
+  end
+
+  # 允许被搜索的属性列表
+  def self.ransackable_attributes(auth_object = nil)
+    [ "code", "created_at", "id", "id_value", "name", "slug", "updated_at" ]
+  end
+end
diff --git a/config/locales/cities.en.yml b/config/locales/cities.en.yml
new file mode 100644
index 0000000..3937a2c
--- /dev/null
+++ b/config/locales/cities.en.yml
@@ -0,0 +1,118 @@
+en:
+  cities:
+    # Australia
+    sydney: 'Sydney'
+    melbourne: 'Melbourne'
+
+    # Bangladesh
+    dhaka: 'Dhaka'
+
+    # Brazil
+    rio_de_janeiro: 'Rio de Janeiro'
+
+    # Canada
+    toronto: 'Toronto'
+
+    # China
+    shanghai: 'Shanghai'
+    beijing: 'Beijing'
+    shenzhen: 'Shenzhen'
+    guangzhou: 'Guangzhou'
+    chengdu: 'Chengdu'
+    tianjin: 'Tianjin'
+    wuhan: 'Wuhan'
+    dongguan: 'Dongguan'
+    chongqing: 'Chongqing'
+    xian: "Xi'an"
+    hangzhou: 'Hangzhou'
+    foshan: 'Foshan'
+    nanjing: 'Nanjing'
+    hong_kong: 'Hong Kong'
+    shenyang: 'Shenyang'
+    zhengzhou: 'Zhengzhou'
+    qingdao: 'Qingdao'
+    suzhou: 'Suzhou'
+    changsha: 'Changsha'
+    jinan: 'Jinan'
+    kunming: 'Kunming'
+    harbin: 'Harbin'
+    shijiazhuang: 'Shijiazhuang'
+    hefei: 'Hefei'
+    dalian: 'Dalian'
+    xiamen: 'Xiamen'
+    nanning: 'Nanning'
+    changchun: 'Changchun'
+    taiyuan: 'Taiyuan'
+    new_taipei_city: 'New Taipei City'
+    guiyang: 'Guiyang'
+    wuxi: 'Wuxi'
+    shantou: 'Shantou'
+    urumqi: 'Ürümqi'
+    zhongshan: 'Zhongshan'
+    ningbo: 'Ningbo'
+    fuzhou: 'Fuzhou'
+    nanchang: 'Nanchang'
+
+    # Democratic Republic of the Congo
+    kinshasa: 'Kinshasa'
+
+    # Egypt
+    alexandria: 'Alexandria'
+
+    # France
+    paris: 'Paris'
+
+    # Germany
+    frankfurt: 'Frankfurt'
+    berlin: 'Berlin'
+
+    # India
+    mumbai: 'Mumbai'
+    bengaluru: 'Bengaluru'
+
+    # Japan
+    tokyo: 'Tokyo'
+    yokohama: 'Yokohama'
+
+    # Mexico
+    mexico_city: 'Mexico City'
+
+    # Nigeria
+    lagos: 'Lagos'
+
+    # Pakistan
+    lahore: 'Lahore'
+
+    # Russia
+    moscow: 'Moscow'
+    sankt_petersburg: 'Sankt Petersburg'
+
+    # Saudi Arabia
+    riyadh: 'Riyadh'
+
+    # Singapore
+    singapore: 'Singapore'
+
+    # South Korea
+    seoul: 'Seoul'
+
+    # Thailand
+    bangkok: 'Bangkok'
+
+    # Turkey
+    istanbul: 'İstanbul'
+    ankara: 'Ankara'
+
+    # United Kingdom
+    london: 'London'
+
+    # United States
+    san_francisco: 'San Francisco'
+    chicago: 'Chicago'
+    new_york_city: 'New York City'
+    los_angeles: 'Los Angeles'
+
+    # Vietnam
+    ho_chi_minh_city: 'Ho Chi Minh City'
+    hanoi: 'Hanoi'
+
diff --git a/config/locales/cities.zh-CN.yml b/config/locales/cities.zh-CN.yml
new file mode 100644
index 0000000..c862887
--- /dev/null
+++ b/config/locales/cities.zh-CN.yml
@@ -0,0 +1,118 @@
+
+zh-CN:
+  cities:
+    # Australia
+    sydney: '悉尼'
+    melbourne: '墨尔本'
+
+    # Bangladesh
+    dhaka: '达卡'
+
+    # Brazil
+    rio_de_janeiro: '里约热内卢'
+
+    # Canada
+    toronto: '多伦多'
+
+    # China
+    shanghai: '上海'
+    beijing: '北京'
+    shenzhen: '深圳'
+    guangzhou: '广州'
+    chengdu: '成都'
+    tianjin: '天津'
+    wuhan: '武汉'
+    dongguan: '东莞'
+    chongqing: '重庆'
+    xian: '西安'
+    hangzhou: '杭州'
+    foshan: '佛山'
+    nanjing: '南京'
+    hong_kong: '香港'
+    shenyang: '沈阳'
+    zhengzhou: '郑州'
+    qingdao: '青岛'
+    suzhou: '苏州'
+    changsha: '长沙'
+    jinan: '济南'
+    kunming: '昆明'
+    harbin: '哈尔滨'
+    shijiazhuang: '石家庄'
+    hefei: '合肥'
+    dalian: '大连'
+    xiamen: '厦门'
+    nanning: '南宁'
+    changchun: '长春'
+    taiyuan: '太原'
+    new_taipei_city: '新北市'
+    guiyang: '贵阳'
+    wuxi: '无锡'
+    shantou: '汕头'
+    urumqi: '乌鲁木齐'
+    zhongshan: '中山'
+    ningbo: '宁波'
+    fuzhou: '福州'
+    nanchang: '南昌'
+
+    # Democratic Republic of the Congo
+    kinshasa: '金沙萨'
+
+    # Egypt
+    alexandria: '亚历山大'
+
+    # France
+    paris: '巴黎'
+
+    # Germany
+    frankfurt: '法兰克福'
+    berlin: '柏林'
+
+    # India
+    mumbai: '孟买'
+    bengaluru: '班加罗尔'
+
+    # Japan
+    tokyo: '东京'
+    yokohama: '横滨'
+
+    # Mexico
+    mexico_city: '墨西哥城'
+
+    # Nigeria
+    lagos: '拉各斯'
+
+    # Pakistan
+    lahore: '拉合尔'
+
+    # Russia
+    moscow: '莫斯科'
+    sankt_petersburg: '圣彼得堡'
+
+    # Saudi Arabia
+    riyadh: '利雅得'
+
+    # Singapore
+    singapore: '新加坡'
+
+    # South Korea
+    seoul: '首尔'
+
+    # Thailand
+    bangkok: '曼谷'
+
+    # Turkey
+    istanbul: '伊斯坦布尔'
+    ankara: '安卡拉'
+
+    # United Kingdom
+    london: '伦敦'
+
+    # United States
+    san_francisco: '旧金山'
+    chicago: '芝加哥'
+    new_york_city: '纽约'
+    los_angeles: '洛杉矶'
+
+    # Vietnam
+    ho_chi_minh_city: '胡志明市'
+    hanoi: '河内'
diff --git a/config/locales/countries.en.yml b/config/locales/countries.en.yml
new file mode 100644
index 0000000..7c0b858
--- /dev/null
+++ b/config/locales/countries.en.yml
@@ -0,0 +1,55 @@
+en:
+  countries:
+    # East Asia
+    CN: 'China'
+    JP: 'Japan'
+    KR: 'South Korea'
+    TW: 'Taiwan'
+    HK: 'Hong Kong'
+
+    # South Asia
+    IN: 'India'
+    PK: 'Pakistan'
+    BD: 'Bangladesh'
+
+    # Southeast Asia
+    ID: 'Indonesia'
+    VN: 'Vietnam'
+    TH: 'Thailand'
+    MM: 'Myanmar'
+    SG: 'Singapore'
+
+    # Middle East
+    TR: 'Turkey'
+    IR: 'Iran'
+    SA: 'Saudi Arabia'
+    IQ: 'Iraq'
+
+    # Africa
+    NG: 'Nigeria'
+    EG: 'Egypt'
+    CD: 'Democratic Republic of the Congo'
+    TZ: 'Tanzania'
+    ZA: 'South Africa'
+    KE: 'Kenya'
+    AO: 'Angola'
+    ML: 'Mali'
+    CI: 'Ivory Coast'
+
+    # Europe
+    RU: 'Russia'
+    GB: 'United Kingdom'
+    DE: 'Germany'
+
+    # North America
+    US: 'United States'
+    MX: 'Mexico'
+
+    # South America
+    BR: 'Brazil'
+    PE: 'Peru'
+    CO: 'Colombia'
+    CL: 'Chile'
+
+    # Oceania
+    AU: 'Australia'
\ No newline at end of file
diff --git a/config/locales/countries.zh-CN.yml b/config/locales/countries.zh-CN.yml
new file mode 100644
index 0000000..0547529
--- /dev/null
+++ b/config/locales/countries.zh-CN.yml
@@ -0,0 +1,55 @@
+zh-CN:
+  countries:
+    # East Asia
+    CN: '中国'
+    JP: '日本'
+    KR: '韩国'
+    TW: '台湾'
+    HK: '香港'
+
+    # South Asia
+    IN: '印度'
+    PK: '巴基斯坦'
+    BD: '孟加拉国'
+
+    # Southeast Asia
+    ID: '印度尼西亚'
+    VN: '越南'
+    TH: '泰国'
+    MM: '缅甸'
+    SG: '新加坡'
+
+    # Middle East
+    TR: '土耳其'
+    IR: '伊朗'
+    SA: '沙特阿拉伯'
+    IQ: '伊拉克'
+
+    # Africa
+    NG: '尼日利亚'
+    EG: '埃及'
+    CD: '刚果民主共和国'
+    TZ: '坦桑尼亚'
+    ZA: '南非'
+    KE: '肯尼亚'
+    AO: '安哥拉'
+    ML: '马里'
+    CI: '科特迪瓦'
+
+    # Europe
+    RU: '俄罗斯'
+    GB: '英国'
+    DE: '德国'
+
+    # North America
+    US: '美国'
+    MX: '墨西哥'
+
+    # South America
+    BR: '巴西'
+    PE: '秘鲁'
+    CO: '哥伦比亚'
+    CL: '智利'
+
+    # Oceania
+    AU: '澳大利亚'
\ No newline at end of file
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 6c349ae..4e65d5c 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -28,4 +28,4 @@
 #       enabled: "ON"
 
 en:
-  hello: "Hello world"
+  hello: "Hello world"
\ No newline at end of file
diff --git a/config/locales/regions.en.yml b/config/locales/regions.en.yml
new file mode 100644
index 0000000..8558328
--- /dev/null
+++ b/config/locales/regions.en.yml
@@ -0,0 +1,15 @@
+en:
+  regions:
+    AS: 'Asia'
+    SA: 'South Asia'
+    SEA: 'Southeast Asia'
+    EA: 'East Asia'
+    ME: 'Middle East'
+    AF: 'Africa'
+    NA: 'North Africa'
+    SSA: 'Sub-Saharan Africa'
+    EU: 'Europe'
+    NAM: 'North America'
+    SAM: 'South America'
+    CAM: 'Central America'
+    OC: 'Oceania'
\ No newline at end of file
diff --git a/config/locales/regions.zh-CN.yml b/config/locales/regions.zh-CN.yml
new file mode 100644
index 0000000..14f19f9
--- /dev/null
+++ b/config/locales/regions.zh-CN.yml
@@ -0,0 +1,15 @@
+zh-CN:
+  regions:
+    AS: '亚洲'
+    SA: '南亚'
+    SEA: '东南亚'
+    EA: '东亚'
+    ME: '中东'
+    AF: '非洲'
+    NA: '北非'
+    SSA: '撒哈拉以南非洲'
+    EU: '欧洲'
+    NAM: '北美洲'
+    SAM: '南美洲'
+    CAM: '中美洲'
+    OC: '大洋洲'
\ No newline at end of file
diff --git a/db/migrate/20250121015832_create_regions.rb b/db/migrate/20250121015832_create_regions.rb
new file mode 100644
index 0000000..6e374d8
--- /dev/null
+++ b/db/migrate/20250121015832_create_regions.rb
@@ -0,0 +1,13 @@
+class CreateRegions < ActiveRecord::Migration[8.0]
+  def change
+    create_table :regions do |t|
+      t.string :name
+      t.string :code
+      t.string :slug
+
+      t.timestamps
+    end
+    add_index :regions, :code, unique: true
+    add_index :regions, :slug, unique: true
+  end
+end
diff --git a/db/migrate/20250121015841_create_countries.rb b/db/migrate/20250121015841_create_countries.rb
new file mode 100644
index 0000000..c6f5836
--- /dev/null
+++ b/db/migrate/20250121015841_create_countries.rb
@@ -0,0 +1,14 @@
+class CreateCountries < ActiveRecord::Migration[8.0]
+  def change
+    create_table :countries do |t|
+      t.string :name
+      t.string :code
+      t.string :slug
+      t.references :region, null: false, foreign_key: true
+
+      t.timestamps
+    end
+    add_index :countries, :code, unique: true
+    add_index :countries, :slug, unique: true
+  end
+end
diff --git a/db/migrate/20250121015849_add_country_to_cities.rb b/db/migrate/20250121015849_add_country_to_cities.rb
new file mode 100644
index 0000000..cff302a
--- /dev/null
+++ b/db/migrate/20250121015849_add_country_to_cities.rb
@@ -0,0 +1,5 @@
+class AddCountryToCities < ActiveRecord::Migration[8.0]
+  def change
+    add_reference :cities, :country, null: false, foreign_key: true
+  end
+end
diff --git a/db/migrate/20250121020653_remove_geographic_fields_from_cities.rb b/db/migrate/20250121020653_remove_geographic_fields_from_cities.rb
new file mode 100644
index 0000000..2092bbf
--- /dev/null
+++ b/db/migrate/20250121020653_remove_geographic_fields_from_cities.rb
@@ -0,0 +1,6 @@
+class RemoveGeographicFieldsFromCities < ActiveRecord::Migration[8.0]
+  def change
+    remove_column :cities, :region, :string
+    remove_column :cities, :country, :string
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index de46ad8..2a28d50 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_01_19_032348) do
+ActiveRecord::Schema[8.0].define(version: 2025_01_21_020653) do
   create_table "active_admin_comments", force: :cascade do |t|
     t.string "namespace"
     t.text "body"
@@ -67,21 +67,33 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_19_032348) do
 
   create_table "cities", force: :cascade do |t|
     t.string "name"
-    t.string "country"
     t.float "latitude"
     t.float "longitude"
     t.boolean "active"
     t.integer "priority"
     t.string "timezone"
-    t.string "region"
     t.datetime "last_weather_fetch"
     t.datetime "last_image_generation"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.string "slug"
+    t.integer "country_id", null: false
+    t.index ["country_id"], name: "index_cities_on_country_id"
     t.index ["slug"], name: "index_cities_on_slug", unique: true
   end
 
+  create_table "countries", force: :cascade do |t|
+    t.string "name"
+    t.string "code"
+    t.string "slug"
+    t.integer "region_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["code"], name: "index_countries_on_code", unique: true
+    t.index ["region_id"], name: "index_countries_on_region_id"
+    t.index ["slug"], name: "index_countries_on_slug", unique: true
+  end
+
   create_table "friendly_id_slugs", force: :cascade do |t|
     t.string "slug", null: false
     t.integer "sluggable_id", null: false
@@ -93,6 +105,16 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_19_032348) do
     t.index ["sluggable_type", "sluggable_id"], name: "index_friendly_id_slugs_on_sluggable_type_and_sluggable_id"
   end
 
+  create_table "regions", force: :cascade do |t|
+    t.string "name"
+    t.string "code"
+    t.string "slug"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["code"], name: "index_regions_on_code", unique: true
+    t.index ["slug"], name: "index_regions_on_slug", unique: true
+  end
+
   create_table "weather_arts", force: :cascade do |t|
     t.integer "city_id", null: false
     t.date "weather_date"
@@ -114,5 +136,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_19_032348) do
 
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
+  add_foreign_key "cities", "countries"
+  add_foreign_key "countries", "regions"
   add_foreign_key "weather_arts", "cities"
 end
diff --git a/db/seeds.rb b/db/seeds.rb
index 591fca6..e4dfc6d 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -9,15 +9,150 @@
 #   end
 AdminUser.create!(email: 'admin@example.com', password: 'password', password_confirmation: 'password') if Rails.env.development?
 
+WeatherArt.delete_all
+City.delete_all
+Country.delete_all
+Region.delete_all
+
+# 创建区域
+regions = Region.create!([
+  {
+    name: 'Asia',
+    code: 'AS'
+  },
+  {
+    name: 'South Asia',
+    code: 'SA'
+  },
+  {
+    name: 'Southeast Asia',
+    code: 'SEA'
+  },
+  {
+    name: 'East Asia',
+    code: 'EA'
+  },
+  {
+    name: 'Middle East',
+    code: 'ME'
+  },
+  {
+    name: 'Africa',
+    code: 'AF'
+  },
+  {
+    name: 'North Africa',
+    code: 'NA'
+  },
+  {
+    name: 'Sub-Saharan Africa',
+    code: 'SSA'
+  },
+  {
+    name: 'Europe',
+    code: 'EU'
+  },
+  {
+    name: 'North America',
+    code: 'NAM'
+  },
+  {
+    name: 'South America',
+    code: 'SAM'
+  },
+  {
+    name: 'Central America',
+    code: 'CAM'
+  },
+  {
+    name: 'Oceania',
+    code: 'OC'
+  }
+])
+asia = Region.find_by(code: 'AS')
+south_asia = Region.find_by(code: 'SA')
+africa = Region.find_by(code: 'AF')
+europe = Region.find_by(code: 'EU')
+north_america = Region.find_by(code: 'NAM')
+south_america = Region.find_by(code: 'SAM')
+oceania = Region.find_by(code: 'OC')
+
+# 创建所有国家
+Country.create!([
+  # East Asia
+  { name: 'China', code: 'CN', region: asia },
+  { name: 'Japan', code: 'JP', region: asia },
+  { name: 'South Korea', code: 'KR', region: asia },
+  { name: 'Taiwan', code: 'TW', region: asia },
+  { name: 'Hong Kong', code: 'HK', region: asia },
+
+  # South Asia
+  { name: 'India', code: 'IN', region: south_asia },
+  { name: 'Pakistan', code: 'PK', region: south_asia },
+  { name: 'Bangladesh', code: 'BD', region: south_asia },
+
+  # Southeast Asia
+  { name: 'Indonesia', code: 'ID', region: asia },
+  { name: 'Vietnam', code: 'VN', region: asia },
+  { name: 'Thailand', code: 'TH', region: asia },
+  { name: 'Myanmar', code: 'MM', region: asia },
+  { name: 'Singapore', code: 'SG', region: asia },
+  { name: 'Bangladesh', code: 'BD', region: asia },
+
+  # Middle East
+  { name: 'Turkey', code: 'TR', region: asia },
+  { name: 'Iran', code: 'IR', region: asia },
+  { name: 'Saudi Arabia', code: 'SA', region: asia },
+  { name: 'Iraq', code: 'IQ', region: asia },
+
+  # Africa
+  { name: 'Nigeria', code: 'NG', region: africa },
+  { name: 'Egypt', code: 'EG', region: africa },
+  { name: 'Democratic Republic of the Congo', code: 'CD', region: africa },
+  { name: 'Tanzania', code: 'TZ', region: africa },
+  { name: 'South Africa', code: 'ZA', region: africa },
+  { name: 'Kenya', code: 'KE', region: africa },
+  { name: 'Angola', code: 'AO', region: africa },
+  { name: 'Mali', code: 'ML', region: africa },
+  { name: 'Ivory Coast', code: 'CI', region: africa },
+  { name: 'Egypt', code: 'EGY', region: africa },
+
+  # Europe
+  { name: 'Russia', code: 'RU', region: europe },
+  { name: 'United Kingdom', code: 'GB', region: europe },
+  { name: 'Germany', code: 'DE', region: europe },
+  { name: 'France', code: 'FRA', region: europe},
+
+  # North America
+  { name: 'United States', code: 'US', region: north_america },
+  { name: 'Mexico', code: 'MX', region: north_america },
+  { name: 'Canada', code: 'CA', region: north_america },
+
+  # South America
+  { name: 'Brazil', code: 'BR', region: south_america },
+  { name: 'Peru', code: 'PE', region: south_america },
+  { name: 'Colombia', code: 'CO', region: south_america },
+  { name: 'Chile', code: 'CL', region: south_america },
+  { name: 'Brazil', code: 'BZ', region: south_america },
+
+  # Oceania
+  { name: 'Australia', code: 'AU', region: oceania }
+])
+
+# 创建城市
+Dir[Rails.root.join('db/seeds/cities/*.rb')].sort.each do |file|
+  require file
+end
+
+china = Country.find_by(code: 'CHN')
 guangzhou = City.create!(
   name: 'Guangzhou',
-  country: 'China',
   latitude: 23.1291,
   longitude: 113.2644,
-  active: true,
   priority: 50,
+  country: china,
   timezone: 'Asia/Shanghai',
-  region: 'Asia',
+  active: true,
   last_weather_fetch: 10.hours.ago,
   last_image_generation: 10.hours.ago
 )
diff --git a/db/seeds/cities/australia.rb b/db/seeds/cities/australia.rb
new file mode 100644
index 0000000..839fdf7
--- /dev/null
+++ b/db/seeds/cities/australia.rb
@@ -0,0 +1,26 @@
+australia = Country.find_by code: 'AU'
+
+City.create!([
+  {
+    name: 'Sydney',
+    latitude: -33.8688,
+    longitude: 151.2093,
+    country: australia,
+    timezone: 'Australia/Sydney',
+    active: true,
+    priority: 80,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Melbourne',
+    latitude: -37.8136,
+    longitude: 144.9631,
+    country: australia,
+    timezone: 'Australia/Melbourne',
+    active: true,
+    priority: 75,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/bangladesh.rb b/db/seeds/cities/bangladesh.rb
new file mode 100644
index 0000000..de70562
--- /dev/null
+++ b/db/seeds/cities/bangladesh.rb
@@ -0,0 +1,15 @@
+bangladesh = Country.find_by code: 'BD'
+
+City.create!([
+  {
+    name: 'Dhaka',
+    latitude: 23.8103,
+    longitude: 90.4125,
+    country: bangladesh,
+    timezone: 'Asia/Dhaka',
+    active: true,
+    priority: 85,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/brazil.rb b/db/seeds/cities/brazil.rb
new file mode 100644
index 0000000..d76851c
--- /dev/null
+++ b/db/seeds/cities/brazil.rb
@@ -0,0 +1,15 @@
+brazil = Country.find_by code: 'BZ'
+
+City.create!([
+  {
+    name: 'Rio de Janeiro',
+    latitude: -22.9068,
+    longitude: -43.1729,
+    country: brazil,
+    timezone: 'America/Sao_Paulo',
+    active: true,
+    priority: 80,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/canada.rb b/db/seeds/cities/canada.rb
new file mode 100644
index 0000000..8a64e1e
--- /dev/null
+++ b/db/seeds/cities/canada.rb
@@ -0,0 +1,12 @@
+canada = Country.find_by code: 'CA'
+City.create!(
+  name: 'Toronto',
+  latitude: 43.6532,
+  longitude: -79.3832,
+  priority: 50,
+  country: canada,
+  timezone: 'America/Toronto',
+  active: true,
+  last_weather_fetch: 10.hours.ago,
+  last_image_generation: 10.hours.ago
+)
\ No newline at end of file
diff --git a/db/seeds/cities/china.rb b/db/seeds/cities/china.rb
new file mode 100644
index 0000000..e630d78
--- /dev/null
+++ b/db/seeds/cities/china.rb
@@ -0,0 +1,422 @@
+china = Country.find_by code: 'CN'
+
+City.create!([
+  {
+    name: 'Shanghai',
+    latitude: 31.2304,
+    longitude: 121.4737,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Beijing',
+    latitude: 39.9042,
+    longitude: 116.4074,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Shenzhen',
+    latitude: 22.5431,
+    longitude: 114.0579,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Guangzhou',
+    latitude: 23.1291,
+    longitude: 113.2644,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Chengdu',
+    latitude: 30.5728,
+    longitude: 104.0668,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Tianjin',
+    latitude: 39.3434,
+    longitude: 117.3616,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Wuhan',
+    latitude: 30.5928,
+    longitude: 114.3055,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Dongguan',
+    latitude: 23.0208,
+    longitude: 113.7518,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Chongqing',
+    latitude: 29.4316,
+    longitude: 106.9123,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: "Xi'an",
+    latitude: 34.3416,
+    longitude: 108.9398,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Hangzhou',
+    latitude: 30.2741,
+    longitude: 120.1551,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Foshan',
+    latitude: 23.0219,
+    longitude: 113.1216,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Nanjing',
+    latitude: 32.0603,
+    longitude: 118.7969,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Hong Kong',
+    latitude: 22.3193,
+    longitude: 114.1694,
+    country: china,
+    timezone: 'Asia/Hong_Kong',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Shenyang',
+    latitude: 41.8057,
+    longitude: 123.4315,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Zhengzhou',
+    latitude: 34.7472,
+    longitude: 113.6249,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Qingdao',
+    latitude: 36.0671,
+    longitude: 120.3826,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Suzhou',
+    latitude: 31.2990,
+    longitude: 120.5853,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Changsha',
+    latitude: 28.2282,
+    longitude: 112.9388,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Jinan',
+    latitude: 36.6512,
+    longitude: 117.1201,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Kunming',
+    latitude: 25.0389,
+    longitude: 102.7183,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Harbin',
+    latitude: 45.8038,
+    longitude: 126.5340,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Shijiazhuang',
+    latitude: 38.0428,
+    longitude: 114.5149,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Hefei',
+    latitude: 31.8206,
+    longitude: 117.2272,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Dalian',
+    latitude: 38.9140,
+    longitude: 121.6147,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Xiamen',
+    latitude: 24.4798,
+    longitude: 118.0819,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Nanning',
+    latitude: 22.8170,
+    longitude: 108.3665,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Changchun',
+    latitude: 43.8171,
+    longitude: 125.3235,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Taiyuan',
+    latitude: 37.8706,
+    longitude: 112.5489,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'New Taipei City',
+    latitude: 25.0120,
+    longitude: 121.4657,
+    country: china,
+    timezone: 'Asia/Taipei',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Guiyang',
+    latitude: 26.6470,
+    longitude: 106.6302,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Wuxi',
+    latitude: 31.4914,
+    longitude: 120.3119,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Shantou',
+    latitude: 23.3535,
+    longitude: 116.6822,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Ürümqi',
+    latitude: 43.8256,
+    longitude: 87.6168,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Zhongshan',
+    latitude: 22.5415,
+    longitude: 113.3926,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Ningbo',
+    latitude: 29.8683,
+    longitude: 121.5440,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Fuzhou',
+    latitude: 26.0745,
+    longitude: 119.2965,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Nanchang',
+    latitude: 28.6820,
+    longitude: 115.8579,
+    country: china,
+    timezone: 'Asia/Shanghai',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/egypt.rb b/db/seeds/cities/egypt.rb
new file mode 100644
index 0000000..1535830
--- /dev/null
+++ b/db/seeds/cities/egypt.rb
@@ -0,0 +1,15 @@
+egypt = Country.find_by code: 'EGY'
+
+City.create!([
+  {
+    name: 'Alexandria',
+    latitude: 31.2001,
+    longitude: 29.9187,
+    country: egypt,
+    timezone: 'Africa/Cairo',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/france.rb b/db/seeds/cities/france.rb
new file mode 100644
index 0000000..296778e
--- /dev/null
+++ b/db/seeds/cities/france.rb
@@ -0,0 +1,15 @@
+france = Country.find_by code: 'FRA'
+
+City.create!([
+  {
+    name: 'Paris',
+    latitude: 48.8566,
+    longitude: 2.3522,
+    country: france,
+    timezone: 'Europe/Paris',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/germany.rb b/db/seeds/cities/germany.rb
new file mode 100644
index 0000000..16433bf
--- /dev/null
+++ b/db/seeds/cities/germany.rb
@@ -0,0 +1,26 @@
+germany = Country.find_by code: 'DE'
+
+City.create!([
+  {
+    name: 'Frankfurt',
+    latitude: 50.1109,
+    longitude: 8.6821,
+    country: germany,
+    timezone: 'Europe/Berlin',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Berlin',
+    latitude: 52.5200,
+    longitude: 13.4050,
+    country: germany,
+    timezone: 'Europe/Berlin',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/india.rb b/db/seeds/cities/india.rb
new file mode 100644
index 0000000..17fd3ab
--- /dev/null
+++ b/db/seeds/cities/india.rb
@@ -0,0 +1,26 @@
+india = Country.find_by code: 'IN'
+
+City.create!([
+  {
+    name: 'Mumbai',
+    latitude: 19.0760,
+    longitude: 72.8777,
+    country: india,
+    timezone: 'Asia/Kolkata',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Bengaluru',
+    latitude: 12.9716,
+    longitude: 77.5946,
+    country: india,
+    timezone: 'Asia/Kolkata',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/japan.rb b/db/seeds/cities/japan.rb
new file mode 100644
index 0000000..6abce7e
--- /dev/null
+++ b/db/seeds/cities/japan.rb
@@ -0,0 +1,26 @@
+japan = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Tokyo',
+    latitude: 35.6762,
+    longitude: 139.6503,
+    country: japan,
+    timezone: 'Asia/Tokyo',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Yokohama',
+    latitude: 35.4437,
+    longitude: 139.6380,
+    country: japan,
+    timezone: 'Asia/Tokyo',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/mexico.rb b/db/seeds/cities/mexico.rb
new file mode 100644
index 0000000..46cfade
--- /dev/null
+++ b/db/seeds/cities/mexico.rb
@@ -0,0 +1,15 @@
+mexico = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Mexico City',
+    latitude: 19.4326,
+    longitude: -99.1332,
+    country: mexico,
+    timezone: 'America/Mexico_City',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/nigeria.rb b/db/seeds/cities/nigeria.rb
new file mode 100644
index 0000000..2ddcd5d
--- /dev/null
+++ b/db/seeds/cities/nigeria.rb
@@ -0,0 +1,15 @@
+nigeria = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Lagos',
+    latitude: 6.5244,
+    longitude: 3.3792,
+    country: nigeria,
+    timezone: 'Africa/Lagos',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/pakistan.rb b/db/seeds/cities/pakistan.rb
new file mode 100644
index 0000000..dd2b87d
--- /dev/null
+++ b/db/seeds/cities/pakistan.rb
@@ -0,0 +1,15 @@
+pakistan = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Lahore',
+    latitude: 31.5204,
+    longitude: 74.3587,
+    country: pakistan,
+    timezone: 'Asia/Karachi',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/russia.rb b/db/seeds/cities/russia.rb
new file mode 100644
index 0000000..71ee201
--- /dev/null
+++ b/db/seeds/cities/russia.rb
@@ -0,0 +1,26 @@
+russia = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Moscow',
+    latitude: 55.7558,
+    longitude: 37.6173,
+    country: russia,
+    timezone: 'Europe/Moscow',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Sankt Petersburg',
+    latitude: 59.9311,
+    longitude: 30.3609,
+    country: russia,
+    timezone: 'Europe/Moscow',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/saudi_arabia.rb b/db/seeds/cities/saudi_arabia.rb
new file mode 100644
index 0000000..08bcf9f
--- /dev/null
+++ b/db/seeds/cities/saudi_arabia.rb
@@ -0,0 +1,15 @@
+saudi_arabia = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Riyadh',
+    latitude: 24.7136,
+    longitude: 46.6753,
+    country: saudi_arabia,
+    timezone: 'Asia/Riyadh',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/singapore.rb b/db/seeds/cities/singapore.rb
new file mode 100644
index 0000000..384645d
--- /dev/null
+++ b/db/seeds/cities/singapore.rb
@@ -0,0 +1,15 @@
+singapore = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Singapore',
+    latitude: 1.3521,
+    longitude: 103.8198,
+    country: singapore,
+    timezone: 'Asia/Singapore',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/south_korea.rb b/db/seeds/cities/south_korea.rb
new file mode 100644
index 0000000..2ecdd17
--- /dev/null
+++ b/db/seeds/cities/south_korea.rb
@@ -0,0 +1,15 @@
+south_korea = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Seoul',
+    latitude: 37.5665,
+    longitude: 126.9780,
+    country: south_korea,
+    timezone: 'Asia/Seoul',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/thailand.rb b/db/seeds/cities/thailand.rb
new file mode 100644
index 0000000..8914fe9
--- /dev/null
+++ b/db/seeds/cities/thailand.rb
@@ -0,0 +1,15 @@
+thailand = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Bangkok',
+    latitude: 13.7563,
+    longitude: 100.5018,
+    country: thailand,
+    timezone: 'Asia/Bangkok',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/turkey.rb b/db/seeds/cities/turkey.rb
new file mode 100644
index 0000000..1a47f69
--- /dev/null
+++ b/db/seeds/cities/turkey.rb
@@ -0,0 +1,26 @@
+turkey = Country.find_by 1
+
+City.create!([
+  {
+    name: 'İstanbul',
+    latitude: 41.0082,
+    longitude: 28.9784,
+    country: turkey,
+    timezone: 'Europe/Istanbul',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Ankara',
+    latitude: 39.9334,
+    longitude: 32.8597,
+    country: turkey,
+    timezone: 'Europe/Istanbul',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/uk.rb b/db/seeds/cities/uk.rb
new file mode 100644
index 0000000..2692782
--- /dev/null
+++ b/db/seeds/cities/uk.rb
@@ -0,0 +1,15 @@
+uk = Country.find_by 1
+
+City.create!([
+  {
+    name: 'London',
+    latitude: 51.5074,
+    longitude: -0.1278,
+    country: uk,
+    timezone: 'Europe/London',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/usa.rb b/db/seeds/cities/usa.rb
new file mode 100644
index 0000000..91f9eb3
--- /dev/null
+++ b/db/seeds/cities/usa.rb
@@ -0,0 +1,48 @@
+usa = Country.find_by 1
+
+City.create!([
+  {
+    name: 'San Francisco',
+    latitude: 37.7749,
+    longitude: -122.4194,
+    country: usa,
+    timezone: 'America/Los_Angeles',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Chicago',
+    latitude: 41.8781,
+    longitude: -87.6298,
+    country: usa,
+    timezone: 'America/Chicago',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'New York City',
+    latitude: 40.7128,
+    longitude: -74.0060,
+    country: usa,
+    timezone: 'America/New_York',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Los Angeles',
+    latitude: 34.0522,
+    longitude: -118.2437,
+    country: usa,
+    timezone: 'America/Los_Angeles',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
\ No newline at end of file
diff --git a/db/seeds/cities/vietnam.rb b/db/seeds/cities/vietnam.rb
new file mode 100644
index 0000000..43cfd86
--- /dev/null
+++ b/db/seeds/cities/vietnam.rb
@@ -0,0 +1,26 @@
+vietnam = Country.find_by 1
+
+City.create!([
+  {
+    name: 'Ho Chi Minh City',
+    latitude: 10.8231,
+    longitude: 106.6297,
+    country: vietnam,
+    timezone: 'Asia/Ho_Chi_Minh',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  },
+  {
+    name: 'Hanoi',
+    latitude: 21.0285,
+    longitude: 105.8542,
+    country: vietnam,
+    timezone: 'Asia/Ho_Chi_Minh',
+    active: true,
+    priority: 100,
+    last_weather_fetch: 10.hours.ago,
+    last_image_generation: 10.hours.ago
+  }
+])
diff --git a/test/fixtures/cities.yml b/test/fixtures/cities.yml
index b1abf5f..2780538 100644
--- a/test/fixtures/cities.yml
+++ b/test/fixtures/cities.yml
@@ -9,7 +9,6 @@
 #  active: false
 #  priority: 1
 #  timezone: MyString
-#  population: 1
 #  region: MyString
 #  last_weather_fetch: 2025-01-19 10:28:26
 #  last_image_generation: 2025-01-19 10:28:26
@@ -23,7 +22,6 @@
 #  active: false
 #  priority: 1
 #  timezone: MyString
-#  population: 1
 #  region: MyString
 #  last_weather_fetch: 2025-01-19 10:28:26
 #  last_image_generation: 2025-01-19 10:28:26
diff --git a/test/fixtures/countries.yml b/test/fixtures/countries.yml
new file mode 100644
index 0000000..e65f3f6
--- /dev/null
+++ b/test/fixtures/countries.yml
@@ -0,0 +1,13 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+#one:
+#  name: MyString
+#  code: MyString
+#  slug: MyString
+#  region: one
+#
+#two:
+#  name: MyString
+#  code: MyString
+#  slug: MyString
+#  region: two
diff --git a/test/fixtures/regions.yml b/test/fixtures/regions.yml
new file mode 100644
index 0000000..44929e0
--- /dev/null
+++ b/test/fixtures/regions.yml
@@ -0,0 +1,11 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+#one:
+#  name: MyString
+#  code: MyString
+#  slug: MyString
+#
+#two:
+#  name: MyString
+#  code: MyString
+#  slug: MyString
diff --git a/test/models/country_test.rb b/test/models/country_test.rb
new file mode 100644
index 0000000..5cecb96
--- /dev/null
+++ b/test/models/country_test.rb
@@ -0,0 +1,7 @@
+require "test_helper"
+
+class CountryTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end
diff --git a/test/models/region_test.rb b/test/models/region_test.rb
new file mode 100644
index 0000000..1aa672c
--- /dev/null
+++ b/test/models/region_test.rb
@@ -0,0 +1,7 @@
+require "test_helper"
+
+class RegionTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end