There is no specific time for the issuance of the admission notice, just like the admission result. Generally speaking, it is about 20 days after the admission results are announced. According to the actual situation this year, it is expected that the admission notice will be delivered to all students from late August to early September.
The time for undergraduate schools to issue admission notices may be early or late due to school work arrangements. So you just need to check which college you are admitted to at the entrance of the admission result inquiry, and wait quietly for the arrival of the admission notice.
In previous years, the special edition admission notice was basically sent by the undergraduate school to the candidate's source school (that is, your college), and then the source school informed the candidate to collect it.
However, considering the epidemic period, in order to reduce the flow of people in various cities, this year it may be mailed directly to you according to the contact address you filled in when you signed up. Therefore, students must keep their mobile phones on when waiting for the admission notice, so as not to miss the express message.