diff --git a/webapp/models/HashRate.php b/webapp/models/HashRate.php
index f038ae92..1ed8d793 100644
--- a/webapp/models/HashRate.php
+++ b/webapp/models/HashRate.php
@@ -3,6 +3,9 @@
 
 namespace models;
 
+require_once('mt/AchievementsPower.php');
+
+use mt\AchievementsPower;
 use phpcommon\SqlHelper;
 class HashRate  extends BaseModel
 {
@@ -32,6 +35,7 @@ class HashRate  extends BaseModel
     }
 
     public static function getCount($period){
+        $count = 0;
         $rows = SqlHelper::ormSelect(
             myself()->_getSelfMysql(),
             't_hash_rate',
@@ -40,7 +44,13 @@ class HashRate  extends BaseModel
                 'period' => $period,
             )
         );
-        return count($rows);
+        foreach ($rows as $row){
+            $hashMeta = AchievementsPower::find($row['task_id']);
+            if ($hashMeta['task_type'] != AchievementsPower::TYPE5){
+                $count += 1;
+            }
+        }
+        return $count;
     }
 
 
diff --git a/webapp/mt/BattleRandAttribute.php b/webapp/mt/BattleRandAttribute.php
index d8d79ae7..14f4602a 100644
--- a/webapp/mt/BattleRandAttribute.php
+++ b/webapp/mt/BattleRandAttribute.php
@@ -39,12 +39,13 @@ class BattleRandAttribute {
         $strs = explode('|', $randMeta['attributeRange']);
         foreach ($strs as $str){
             $attrStr = explode(':', $str);
-            $rnd = rand($attrStr[1]*100000 , $attrStr[2]*100000) / 100000;
-//            $val = $attrStr[1] + ($attrStr[2] - $attrStr[1]) * $rnd;
-            array_push($attrArray,array(
-                "attr_id" => $attrStr[0],
-                "val" => $rnd,
-            ));
+            if (count($attrStr) == 3){
+                $rnd = rand($attrStr[1]*100000 , $attrStr[2]*100000) / 100000;
+                array_push($attrArray,array(
+                    "attr_id" => $attrStr[0],
+                    "val" => $rnd,
+                ));
+            }
         }
         return $attrArray;
     }
diff --git a/webapp/services/HashRateService.php b/webapp/services/HashRateService.php
index 4c849017..c3743b6f 100644
--- a/webapp/services/HashRateService.php
+++ b/webapp/services/HashRateService.php
@@ -344,7 +344,8 @@ class HashRateService extends BaseService
     private function randHashRateTaskList($type){
         $metas = AchievementsPower::getListByType($type);
         $this->hashRateTask['task'.$type] = array();
-        foreach (array_rand($metas, 4) as $key) {
+        $count = count($metas) >= 4 ? 4 : count($metas) ;
+        foreach (array_rand($metas, $count) as $key) {
             $meta = $metas[$key];
             if (count($this->hashRateTask['task'.$type]) >=
                 4) {