diff --git a/sql/gamedb.sql b/sql/gamedb.sql
index c54c180e..fbadd09d 100644
--- a/sql/gamedb.sql
+++ b/sql/gamedb.sql
@@ -1948,3 +1948,22 @@ CREATE TABLE `t_box_alloc` (
   KEY `idx_createtime` (`createtime`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10001 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
+
+--
+-- Table structure for table `t_middata`
+--
+
+DROP TABLE IF EXISTS `t_middata`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `t_middata` (
+  `idx` bigint NOT NULL AUTO_INCREMENT COMMENT '自增id',
+  `account_id` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'account_id',
+  `type` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'type',
+  `data` text COMMENT 'data',
+  `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
+  `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
+  PRIMARY KEY (`idx`),
+  UNIQUE KEY `account_id_type` (`account_id`, `type`)
+) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
+/*!40101 SET character_set_client = @saved_cs_client */;
diff --git a/webapp/controller/BigwheelController.class.php b/webapp/controller/BigwheelController.class.php
index 9bb009b9..f2986488 100644
--- a/webapp/controller/BigwheelController.class.php
+++ b/webapp/controller/BigwheelController.class.php
@@ -1,17 +1,13 @@
 <?php
 
-require_once('mt/Sign.php');
 require_once('mt/Parameter.php');
 
-require_once('models/SignLog.php');
-
 require_once('services/LogService.php');
 require_once('services/AwardService.php');
 require_once('services/PropertyChgService.php');
 
 use phpcommon\SqlHelper;
 use models\User;
-use models\SignLog;
 use services\LogService;
 
 class BigwheelController extends BaseAuthedController
diff --git a/webapp/models/MidData.php b/webapp/models/MidData.php
new file mode 100644
index 00000000..8c5a61b0
--- /dev/null
+++ b/webapp/models/MidData.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace models;
+
+use mt;
+use phpcommon\SqlHelper;
+
+class MidData extends BaseModel {
+
+    public static function getData($type)
+    {
+        $row = SqlHelper::ormSelectOne(
+            myself()->_getSelfMysql(),
+            't_middata',
+            array(
+                'account_id' => myself()->_getAccountId(),
+                'type' => $type,
+            )
+        );
+        return $row ? json_decode($row['data'], true) : null;
+    }
+
+
+    public static function setData($type, $data)
+    {
+        SqlHelper::upsert
+            (myself()->_getSelfMysql(),
+             't_middata',
+             array(
+                 'account_id' => myself()->_getAccountId(),
+                 'type' => $type
+             ),
+             array(
+                 'data' => $data,
+                 'modifytime' => myself()->_getNowTime()
+             ),
+             array(
+                 'account_id' => myself()->_getAccountId(),
+                 'type' => $type,
+                 'data' => $data,
+                 'createtime' => myself()->_getNowTime(),
+                 'modifytime' => myself()->_getNowTime()
+             )
+            );
+    }
+
+}