Why can't China Mobile receive SMS?

It may be a network problem, a mobile phone problem, or the congestion of the short message platform of the mobile company. You can test it and send text messages to yourself and another mobile user at the same time. If he received it right away, then you didn't receive it. It's probably your own mobile phone. In this case, you can try to send a short message with someone else's mobile phone on the card and see if you can receive it soon. If you are sure, it is your mobile phone problem.