diff --git a/app/services/ai_service.rb b/app/services/ai_service.rb
index 568915c..97a0bd0 100644
--- a/app/services/ai_service.rb
+++ b/app/services/ai_service.rb
@@ -83,9 +83,12 @@ class AiService
       - Feature iconic landmarks or architecture from #{city.name}
       - Realistic style
       - Weather conditions should be clearly visible
+      - Keep the picture clear and bright and avoid blurring
+      - Ensure the overall brightness is maintained, even in overcast conditions, by incorporating vibrant colors and soft lighting effects.
+      - If it’s a sunny day, enhance the brightness and warmth of the scene.
       - Atmospheric and artistic composition
 
-      Generate a detailed, creative prompt that will produce a beautiful and realistic image.
+      Generate a detailed, creative prompt that will produce a beautiful and realistic image. Directly output prompt words, no prefix and suffix words
     PROMPT
   end
 end