Seven days. According to the regulations of the Ministry of Education, the admission notice should be sent one week after the end of this batch of admission. July is the time for sending and receiving batches in advance, and August and September are the time for sending and receiving batches of undergraduate courses and higher vocational colleges. For the time when the admission notice is issued, the specific mailing time depends on the distance between the two places. In principle, it should be sent in a relatively far place and arrive within 10 days after mailing.