diff --git a/assets/Scripts/chat18x/core/ChatAIService.ts b/assets/Scripts/chat18x/core/ChatAIService.ts
index 582e2276..e629d0f1 100644
--- a/assets/Scripts/chat18x/core/ChatAIService.ts
+++ b/assets/Scripts/chat18x/core/ChatAIService.ts
@@ -210,13 +210,13 @@ export class ChatAIService {
           let userData = {
             isAi: false,
             msg: message,
-            msgId: new Date().getTime(),
+            msgId: new Date().getTime().toString(),
           };
           msgList.push(userData);
           let aiData = {
             isAi: true,
             msg: response.text,
-            msgId: new Date().getTime() + 1,
+            msgId: (new Date().getTime() + 1).toString(),
           };
           msgList.push(aiData);
           this.reqChatMsg(roleId, msgList);