diff --git a/controller/groupAgent/agent.ts b/controller/groupAgent/agent.ts
index 721360c..0fe74db 100644
--- a/controller/groupAgent/agent.ts
+++ b/controller/groupAgent/agent.ts
@@ -44,7 +44,9 @@ const agent = async (ctx: Context.Data) => {
   let userInput = rawMsgText
   for (const mention of mentions ?? []) {
     if (mention.id.user_id) {
-      userInput = userInput.replace(mention.key, mention.name)
+      userInput = userInput.replace(mention.key, `@${mention.name}`)
+    } else {
+      userInput = userInput.replace(mention.key, "")
     }
   }