China Mobile suddenly sent me a text message with several qwers. What happened?

The reasons for sending text messages are as follows:

This situation is probably because he asked you to do a business, for example, he asked you to activate 5G or some other business, then you If you don't reply to him, he will keep sending you messages. Anyway, it is free for him to send messages. If you don't need it, you can just block him directly, or call the customer and tell him not to send it again.