diff --git a/app/src/main/java/com/gamedog/vididin/login/AccountManager.kt b/app/src/main/java/com/gamedog/vididin/login/AccountManager.kt
index de4981f..22d62ab 100644
--- a/app/src/main/java/com/gamedog/vididin/login/AccountManager.kt
+++ b/app/src/main/java/com/gamedog/vididin/login/AccountManager.kt
@@ -60,8 +60,12 @@ object AccountManager {
         return !backInfo?.bankName.isNullOrEmpty() && !backInfo.bankAccount.isNullOrEmpty()
     }
 
-    fun saveBankAccount(bankAccount: String) {
-        mAccount?.bankInfo = BankInfo(bankAccount=bankAccount)
+    fun saveBankAccount(bankAccount: String?) {
+        if (bankAccount.isNullOrEmpty()) {
+            mAccount?.bankInfo = null
+        } else {
+            mAccount?.bankInfo = BankInfo(bankAccount=bankAccount)
+        }
         saveAccountInfo()
         NotifyMan.instance().sendEvent(
             VididinEvents.Event_Account_Bank_Info_Changed, NotifyMan.NotifyData(bankAccount))
diff --git a/app/src/main/java/com/gamedog/vididin/manager/TaskManager.kt b/app/src/main/java/com/gamedog/vididin/manager/TaskManager.kt
index 7b00e40..3b2bb89 100644
--- a/app/src/main/java/com/gamedog/vididin/manager/TaskManager.kt
+++ b/app/src/main/java/com/gamedog/vididin/manager/TaskManager.kt
@@ -215,6 +215,7 @@ class TaskManager private constructor() {
         }
 
         SpUtil.instance().putObject(SpUtil.KEY_TASK_BEAN, mDailySignData)
+        AccountManager.saveBankAccount(null)
     }
 
     fun getForgotSignDays(): Int {