diff --git a/webapp/controller/OutAppPlanetController.class.php b/webapp/controller/OutAppPlanetController.class.php
index 4980e4bb..6751864a 100644
--- a/webapp/controller/OutAppPlanetController.class.php
+++ b/webapp/controller/OutAppPlanetController.class.php
@@ -1,12 +1,15 @@
 <?php
 
+require_once('models/Nft.php');
 require_once('models/Transaction.php');
 
 require_once('services/BlockChainService.php');
 
 use phpcommon\SqlHelper;
 
+use models\Nft;
 use models\Transaction;
+
 use services\BlockChainService;
 
 class OutAppPlanetController extends BaseController {
@@ -60,7 +63,7 @@ class OutAppPlanetController extends BaseController {
             }
             for ($i = 0; $i < $num; ++$i) {
                 array_push($ids, $nftList[$i]);
-                $data[$nftList] = myself()->_getNowTime();
+                $data[$nftList[$i]] = myself()->_getNowTime();
             }
         }
         $price = BlockChainService::formatCurrencyEx(self::PRICE * count($ids), $decimals);
@@ -86,12 +89,21 @@ class OutAppPlanetController extends BaseController {
         if (empty($rawData)) {
             return array();
         }
-        return json_decode($rawData, true);
+        $data = json_decode($rawData, true);
+        $newData = array();
+        foreach ($data as $key => $val) {
+            if (myself()->_getNowTime() - $val > 30) {
+                continue;
+            }
+            $newData[$key] = $val;
+        }
+        return $newData;
     }
 
     private function save($period, $data)
     {
         myself()->_getRedis('')->get(PLANET_BUY_KEY . $period, json_encode($data));
+        myself()->_getRedis('')->pexpire(PLANET_BUY_KEY . $period, 1000 * 3600 * 24);
     }
 
 }