public function handle_request_internal()
 {
     $planId = $this->_params['planId'];
     $result = Bll_HzFixPlan::get_fix_budget($planId);
     if (!empty($result)) {
         $return = array();
         $return["status"] = "ok";
         $return['data']['budget'] = $result;
     } else {
         return Util_MobileAPI::error(Const_APIStatus::E_PLAN_PARAM_ERR);
     }
     return $return;
 }