diff --git a/webapp/controller/BaseController.class.php b/webapp/controller/BaseController.class.php
index 8a211f92..2c0d476f 100644
--- a/webapp/controller/BaseController.class.php
+++ b/webapp/controller/BaseController.class.php
@@ -51,6 +51,13 @@ class BaseController {
         return phpcommon\getMondaySeconds($this->_getNowTime(), $this->timeZone);
     }
 
+    public function _getZid()
+    {
+        $net = getReqVal('_net', '');
+        $zid = $net && count($net) > 3 ? $net[2] : 3;
+        return $zid < 1 || $zid > 4 ? 3 : $zid;
+    }
+
     public function _rspErr($errcode, $errmsg)
     {
         echo json_encode(array(
diff --git a/webapp/controller/TeamController.class.php b/webapp/controller/TeamController.class.php
index 58fc2476..b5e28aeb 100644
--- a/webapp/controller/TeamController.class.php
+++ b/webapp/controller/TeamController.class.php
@@ -10,7 +10,10 @@ class TeamController extends BaseAuthedController {
     public function createTeam()
     {
         $nodeId = getReqVal('node_id', 1);
-        $teamUuid = $nodeId . '_' . md5($this->_getAccountId() . $this->_getNowTime());
+        $zid = myself()->_getZid();
+        $teamUuid = $nodeId . '_' .
+                  $zid . '_' .
+                  md5($this->_getAccountId() . $this->_getNowTime());
 
         $userDb = $this->_getOrmUserInfo();
         $userDto = User::info($userDb);