1. The issuance of the admission notice requires a series of examination and confirmation processes, including the verification of candidates' qualifications, the generation and examination of the admission list, etc. These programs will take some time to complete, which will lead to slow distribution.

2. The courier company is understaffed, the work efficiency is not high, or there is an emergency, which will delay the delivery time of the notice.

3. Express delivery is delayed. Although the school will send the admission notice by EMS, it will take a long time for express delivery to reach its destination because it is at the peak of delivery and there are a large number of notices.