Is it credible that there are many spam messages that people have not sent in the secretary exam?

It's not credible. Blackout and intercept such suggestions

Open Tencent's mobile phone housekeeper-security protection-harassment interception

Besides intercepting spam messages, the housekeeper can also intercept harassing calls and blacklist annoying numbers.

blacklist all numbers that have sent text messages or made phone calls. This will prevent these numbers from texting and calling again to harass users.

second, set the interception keyword.

Words that often appear in spam messages are set as keywords, so that messages with these contents will be intercepted by Tencent's mobile phone housekeeper.

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