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 5524122..982fcc3 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
@@ -4,9 +4,11 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.ama.core.architecture.util.AndroidUtil
 import com.ama.core.architecture.util.DeviceUtil
+import com.ama.core.architecture.util.SpUtil
 import com.gamedog.vididin.VidiConst
 import com.gamedog.vididin.beans.ZeroBuyItem
 import com.gamedog.vididin.beans.ZeroBuyResp
+import com.gamedog.vididin.core.login.login.AccountManager
 import com.gamedog.vididin.netbase.NetworkUtil
 import com.gamedog.vididin.netbase.Result
 import com.gamedog.vididin.request.RequestUtil
@@ -54,10 +56,18 @@ class ZeroBuyViewModel : ViewModel() {
             val curTimeSec = System.currentTimeMillis()/1000
             val signStr = RequestUtil.getZeroBuyRequestSign(curTimeSec, operationVal)
             val requestHeaders = mapOf("Operation" to operationVal.toString(), "Timestamp" to curTimeSec.toString(), "Sign" to signStr)
+            val requestParams = mutableMapOf("AppId" to VidiConst.ZEROBUY_APPID, "DeviceId" to DeviceUtil.generateDeviceId())
+            val userId = AccountManager.getAccount()?.userId?: 0
+            if (userId > 0) {
+                requestParams.put("UserId", userId.toString())
+            }
+            val joinZeroBuyItemIds = SpUtil.instance().getList<Int>(SpUtil.KEY_ZEROBUY_JOINED_ACTIVITY_IDS)
+            if (joinZeroBuyItemIds.isNotEmpty()) {
+                requestParams.put("JoinedPurchaseIds", AndroidUtil.object2Json(joinZeroBuyItemIds))
+            }
+
 
-            val requestParams = mapOf("AppId" to VidiConst.ZEROBUY_APPID, "DeviceId" to DeviceUtil.generateDeviceId())
             val result = NetworkUtil.get("${VidiConst.URL_ZERO_BUY}/anynameisok", requestHeaders, requestParams)
-
             when (result) {
                 is Result.Success -> {
                     val respObj = AndroidUtil.json2Object<ZeroBuyResp>(result.data.string())?.apply {
@@ -65,6 +75,19 @@ class ZeroBuyViewModel : ViewModel() {
                         mFinishedList = AndroidUtil.json2Object<List<ZeroBuyItem>>(FinishedPurchases)
                     }
 
+                    respObj?.UserId?.let {
+                        if (userId <= 0) {
+                            AccountManager.saveUserIdInfo(it)
+                        }
+                    }
+
+                    // TODO - when to record joined activity Ids
+                    /*respObj?.Join?.let {
+                        if (userId <= 0) {
+                            AccountManager.saveUserIdInfo(it)
+                        }
+                    }*/
+
                     _ZeroBuyListData.value = Result.Success(respObj!!)
                 }
                 is Result.Error -> {
diff --git a/core/architecture/src/main/java/com/ama/core/architecture/util/SpUtil.kt b/core/architecture/src/main/java/com/ama/core/architecture/util/SpUtil.kt
index ad8d064..d31bed9 100644
--- a/core/architecture/src/main/java/com/ama/core/architecture/util/SpUtil.kt
+++ b/core/architecture/src/main/java/com/ama/core/architecture/util/SpUtil.kt
@@ -31,6 +31,7 @@ class SpUtil private constructor(spFileName: String) {
         const val KEY_NEWBIE_JOIN_DISCORD = "KEY_NEWBIE_JOIN_DISCORD"
 
 
+        const val KEY_ZEROBUY_JOINED_ACTIVITY_IDS = "KEY_ZEROBUY_JOINED_ACTIVITY_IDS"