diff --git a/packages/ui/certd-client/src/components/plugins/cert/domains-verify-plan-editor/index.vue b/packages/ui/certd-client/src/components/plugins/cert/domains-verify-plan-editor/index.vue
index 14136eb3..8a533211 100644
--- a/packages/ui/certd-client/src/components/plugins/cert/domains-verify-plan-editor/index.vue
+++ b/packages/ui/certd-client/src/components/plugins/cert/domains-verify-plan-editor/index.vue
@@ -55,6 +55,7 @@
                   </div>
                   <div v-if="item.type === 'http'" class="plan-http">
                     <http-verify-plan v-model="item.httpVerifyPlan" @change="onPlanChanged" />
+                    <div class="helper">证书颁发机构将请求 https://yourdomain/.well-known/acme-challenge/xxxxxx 来验证域名所有权。</div>
                   </div>
                 </div>
               </td>
diff --git a/packages/ui/certd-server/src/plugins/plugin-flex/plugins/plugin-refresh-cert.ts b/packages/ui/certd-server/src/plugins/plugin-flex/plugins/plugin-refresh-cert.ts
index 88213029..1feaf560 100644
--- a/packages/ui/certd-server/src/plugins/plugin-flex/plugins/plugin-refresh-cert.ts
+++ b/packages/ui/certd-server/src/plugins/plugin-flex/plugins/plugin-refresh-cert.ts
@@ -91,7 +91,8 @@ export class FlexCDNRefreshCert extends AbstractTaskPlugin {
        *       timeEndAt: Math.floor((new Date(currentInfo.validTo)).getTime() / 1000),
        *
        */
-      const commonNames =[ certReader.detail.issuer.commonName]
+      const topCrt =  CertReader.readCertDetail(certReader.cert.ic)
+      const commonNames =[ topCrt.detail.issuer.commonName]
       const dnsNames = certReader.getAllDomains()
       const timeBeginAt = Math.floor(certReader.detail.notBefore.getTime()  / 1000);
       const timeEndAt = Math.floor(certReader.detail.notAfter.getTime()  / 1000);