diff --git a/jero-web/src/views/otamanagement/otaAuthentication/components/vdrDetial.vue b/jero-web/src/views/otamanagement/otaAuthentication/components/vdrDetial.vue
index 961c2afe5..125aabf9a 100644
--- a/jero-web/src/views/otamanagement/otaAuthentication/components/vdrDetial.vue
+++ b/jero-web/src/views/otamanagement/otaAuthentication/components/vdrDetial.vue
@@ -74,15 +74,15 @@
             <a-col :span="12">
               <div class='detail-box'>
                 <span class='detail-text'>{{$t('certificationStartOne')}}</span>
-                <span class="title-text-text" :title="item.attestationStartTime?item.attestationStartTime:'-'">
-                {{item.attestationStartTime?item.attestationStartTime:'-'}}</span>
+                <span class="title-text-text" :title="item.attestationStartTime?item.attestationStartTime:'--'">
+                {{item.attestationStartTime?item.attestationStartTime:'--'}}</span>
               </div>
             </a-col>
             <a-col :span="12">
               <div class='detail-box'>
                 <span class='detail-text'>{{$t('certificationdeclaration')}}</span>
-                <span class="title-text-text" :title="item.certificationSubmission?item.certificationSubmission:'-'">
-                {{item.certificationSubmission?item.certificationSubmission:'-'}}</span>
+                <span class="title-text-text" :title="item.certificationSubmission?item.certificationSubmission:'--'">
+                {{item.certificationSubmission?item.certificationSubmission:'--'}}</span>
               </div>
             </a-col>
           </a-row>
@@ -90,15 +90,15 @@
             <a-col :span="12">
               <div class='detail-box'>
                 <span class='detail-text'>{{$t('certificationEnd')}}</span>
-                <span class="title-text-text" :title="item.attestationEndTime?item.attestationEndTime:'-'">
-                {{item.attestationEndTime?item.attestationEndTime:'-'}}</span>
+                <span class="title-text-text" :title="item.attestationEndTime?item.attestationEndTime:'--'">
+                {{item.attestationEndTime?item.attestationEndTime:'--'}}</span>
               </div>
             </a-col>
             <a-col :span="12">
               <div class='detail-box'>
                 <span class='detail-text'>{{$t('CertificationProgress')}}</span>
-                <span class="title-text-text" :title="item.attestationSchedule?item.attestationSchedule:'-'">
-                {{item.attestationSchedule?item.attestationSchedule:'-'}}</span>
+                <span class="title-text-text" :title="item.attestationSchedule?item.attestationSchedule:'--'">
+                {{item.attestationSchedule?item.attestationSchedule:'--'}}</span>
               </div>
             </a-col>
           </a-row>