At the same time, I received a lot of spam messages, probably bombing, but they didn't show the number. They were messages with verification codes. Is there any way to find the sender?

Open Tencent Mobile Manager-Protection Monitoring-Harassment Interception

In addition to intercepting spam messages, housekeepers can also intercept harassing calls and blacklist annoying numbers.

Blacklist all the numbers that have sent text messages and made phone calls. This can prevent these numbers from harassing users by texting and calling again.

Second, set the interception keyword.

Set the words that often appear in spam messages as keywords, so that messages containing these contents will be intercepted by Tencent mobile phone housekeeper.

Finally, you can "report" the intercepted spam messages and harassing calls, which can improve the interception accuracy of Tencent mobile phone housekeeper and make "intelligent interception" more reliable.