Only surface mail or ems schools sign for it, and civil servants of the student team come to pick it up regularly. Shentong, Tong Yuan, SF, Dayun and other couriers can't get into the school gate. They just went to the door at noon to send text messages to the students inside, and they came back half an hour after no one came and went. If no one picks up the courier twice, they will return it, so don't use courier, send it by postal channel, and let him send the information to the student team accurately.