diff --git a/Samples/All/Senparc.Weixin.Sample.CommonService/AI/MessageHandlers/CustomMessageHandler_AI.cs b/Samples/All/Senparc.Weixin.Sample.CommonService/AI/MessageHandlers/CustomMessageHandler_AI.cs
index 81f4bc9b5c..3687f44cf9 100644
--- a/Samples/All/Senparc.Weixin.Sample.CommonService/AI/MessageHandlers/CustomMessageHandler_AI.cs
+++ b/Samples/All/Senparc.Weixin.Sample.CommonService/AI/MessageHandlers/CustomMessageHandler_AI.cs
@@ -38,6 +38,7 @@ public partial class CustomMessageHandler
 
 输入“p”暂停，可以暂时保留记忆
 输入“e”退出，彻底删除记忆
+输入“img 文字”生成图片，例如：img 一只猫
 
 [结果由 AI 生成，仅供参考]";