diff --git a/frontend/src/pages/cloud-law/video-call.vue b/frontend/src/pages/cloud-law/video-call.vue
index faa9ee4..36c4473 100644
--- a/frontend/src/pages/cloud-law/video-call.vue
+++ b/frontend/src/pages/cloud-law/video-call.vue
@@ -29,7 +29,7 @@
         </view>
       </view>
 
-      <view v-if="selfTile" class="self-preview">
+      <view v-if="selfTile && primaryTile && !primaryTile.isLocal" class="self-preview">
         <VideoTile
           class="self-video"
           :user-id="selfTile.userId"
@@ -278,7 +278,7 @@ const startTimer = () => {
 const joinMeeting = async () => {
   if (joining.value) return
   const code = formattedCode.value
-  if (!digitsOf(code)) {
+  if (digitsOf(code).length !== 9) {
     joinError.value = '会议号为空'
     return
   }