Chengdu continuing education network can't receive the verification code.

The mobile phone network is poor and there is no signal.

This situation is more likely. Sometimes when we go to a place with poor signal, such as mountainous areas, deep mountains and forests, or the local communication facilities are not perfect, there will be a phenomenon that the mobile phone receives the verification code slowly or even fails to receive it.

If you can't receive the message, you can check whether the mailbox is full first. If yes, please delete some information. If you still can't get it after deleting it, you can change the machine or card to see if it is a hardware factor. After eliminating the above reasons, you can try to test whether it can be received in other places to see if it is the reason for the weak local signal.