diff --git a/app/src/main/java/com/gamedog/vididin/features/zero/ZeroBuyViewModel.kt b/app/src/main/java/com/gamedog/vididin/features/zero/ZeroBuyViewModel.kt
index 1ced775..db73e5f 100644
--- a/app/src/main/java/com/gamedog/vididin/features/zero/ZeroBuyViewModel.kt
+++ b/app/src/main/java/com/gamedog/vididin/features/zero/ZeroBuyViewModel.kt
@@ -102,6 +102,8 @@ class ZeroBuyViewModel : ViewModel() {
                     respObj?.user_id?.let {
                         if (userId <= 0) {
                             AccountManager.saveUserIdInfo(it)
+
+                            saveHasJoinedZeroIds(it, respObj.current_purchases)
                         }
                     }
 
@@ -116,5 +118,18 @@ class ZeroBuyViewModel : ViewModel() {
         }
     }
 
+    private fun saveHasJoinedZeroIds(userId: Int, currentPurchases: List<ZeroBuyItem>) {
+        val joinZeroBuyItemIds = SpUtil.instance().getList<Int>(SpUtil.KEY_ZEROBUY_JOINED_ACTIVITY_IDS).toMutableList()
+        currentPurchases.forEach { zero ->
+            zero.current_users?.let {
+                if (it.contains(userId) && !joinZeroBuyItemIds.contains(userId)) {
+                    joinZeroBuyItemIds.add(zero.id)
+                }
+            }
+        }
+
+        SpUtil.instance().putList(SpUtil.KEY_ZEROBUY_JOINED_ACTIVITY_IDS, joinZeroBuyItemIds)
+    }
+
 
 }
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