public function getClassTuitionInfo($classId)
 {
     if (empty($classId)) {
         return;
     }
     $tId = session('instId');
     $class = new \Home\Model\ClassModel();
     $tuition = $class->getTuitionFromClass($classId, $tId);
     $today = date('Y-m-d');
     $startTimeInt = (int) date('Gi', time() + 8 * 3600);
     $unfinishedClassTimes = $class->countUnfinishedClasses($today, $startTimeInt, $classId, $tId);
     $data = $tuition[0]['tuition_per_class'] . "&" . $unfinishedClassTimes[0]['count'];
     $this->ajaxReturn($data);
 }