You should make sure that Alibaba Cloud's message was not received for any reason, or it was blocked.

Still the service is not in place. If it is a verification code, it should arrive in time, which is usually 5 seconds in the industry. And whether you have violated submission rules, such as signature rules.

If it is not for your own reasons, you can consider other platforms, and the verification code category can recommend S05GK products of Suda Mobile. For notification and marketing, please refer to S03GD and S03GC. ....

Help me adopt it and earn points. Thank you.