diff --git a/src/components/case/index.vue b/src/components/case/index.vue
index 5c27c0d..6554a06 100644
--- a/src/components/case/index.vue
+++ b/src/components/case/index.vue
@@ -245,7 +245,6 @@ export default {
       let stopTime = this.getQueryVariable('stopTime')
       let timestamp = +stopTime;
       if (timestamp != null){
-          sessionStorage.setItem('timestamp', timestamp)
       }else{
           sessionStorage.setItem('timestamp', null)
       }
@@ -253,16 +252,12 @@ export default {
           sessionStorage.setItem('token', token)
           sessionStorage.setItem('cid', cid)
           sessionStorage.setItem('systemId', systemId)
-      }
-      if (projectId){
+          sessionStorage.setItem('timestamp', timestamp)
           sessionStorage.setItem('projectId', projectId)
           sessionStorage.setItem('assessmentId', assessmentId)
           sessionStorage.setItem('classId', classId)
           this.assessmentId = assessmentId
           this.classId = classId
-      }else{
-          // this.assessmentId = ''
-          // this.classId = ''
       }
       let tokens = sessionStorage.getItem('token')
       if(tokens || token){
diff --git a/src/layouts/header/index.vue b/src/layouts/header/index.vue
index bd896cb..0ce171f 100644
--- a/src/layouts/header/index.vue
+++ b/src/layouts/header/index.vue
@@ -33,8 +33,9 @@ export default {
             })
         },
       exit(){
-          let stopTime = sessionStorage.getItem('timestamp')
-          if (stopTime){
+          let assessmentId = sessionStorage.getItem('assessmentId')
+          console.log(assessmentId)
+          if (assessmentId != 'null' && assessmentId != null && assessmentId != ''){
               window.location = 'http://39.108.250.202/student/#/ass/list'
           }else{
               let cid = sessionStorage.getItem('cid')
diff --git a/src/pages/index/list/index.vue b/src/pages/index/list/index.vue
index aa00e68..239da81 100644
--- a/src/pages/index/list/index.vue
+++ b/src/pages/index/list/index.vue
@@ -46,11 +46,7 @@ export default {
             sessionStorage.setItem('token', token)
             sessionStorage.setItem('cid', cid)
             sessionStorage.setItem('systemId', systemId)
-        }
-        if (timestamp != null){
             sessionStorage.setItem('timestamp', timestamp)
-        }else{
-            sessionStorage.setItem('timestamp', null)
         }
     },
     methods: {