public function getCCuser($mid = 0)
 {
     $key = "CCuser" . $mid;
     $memcache = APF_Cache_Factory::get_instance()->get_memcache();
     $list = $memcache->get($key);
     $memcache->delete($key);
     if (!$list) {
         $time = "7200";
         $list = parent::getCCuser($mid);
         $memcache->add($key, $list, 0, $time);
     }
     return $list;
 }