diff --git a/routers/authentication/wechat_event.go b/routers/authentication/wechat_event.go
index 162f1c182..67149de5d 100644
--- a/routers/authentication/wechat_event.go
+++ b/routers/authentication/wechat_event.go
@@ -21,6 +21,10 @@ func AcceptWechatEvent(ctx *context.Context) {
 		replyStr = wechat.HandleSubscribeEvent(we)
 	}
 
+	if replyStr == "" {
+		log.Info("reply str is empty")
+		return
+	}
 	reply := &wechat.Xml{
 		ToUserName:   we.FromUserName,
 		FromUserName: we.ToUserName,