doc: update doc

antdv-demo/components/right_bottom_ad.vue

@@ -1,12 +1,12 @@
 <template>
   <div id="right-bottom">
-    <!-- <img v-if="isCN" width="150" alt="官方公众号" src="https://qn.antdv.com/wechat.jpeg"> -->
     <img
-      v-if="isCN"
+      v-if="isCN && isEffective('2021-10-17 10:00:00', '2021-10-23 18:00:00')"
       width="150"
       alt="早早聊 Vue 专场大会"
       :src="`https://next-antdv.oss-cn-beijing.aliyuncs.com/zaozaoliao.png?v=${Date.now()}`"
     />
+    <img v-else-if="isCN" width="150" alt="官方公众号" src="https://qn.antdv.com/wechat.jpeg" />
     <div v-if="isMobile" class="close" @click="visible = false">
       <a-icon type="close" />
     </div>
@@ -24,6 +24,7 @@ export default {
   props: ['isCN', 'isMobile'],
   data() {
     return {
+      isEffective,
       visible: true,
       ads: [
         {