What is the reason why my husband received the yellow message with qq?

It may be caused by information leakage.

The reason why my husband received yellow messages on qq may be because personal information under big data was leaked, not necessarily because my husband cheated or did something sorry for you. After all, the rapid development of the Internet has brought transparency and openness to our information. Citizens' information is likely to be collected when registering software or logging into any account. Since your husband didn't chat with other women and didn't send any confusing words, he was just sent a short message by an unknown person on QQ, which was basically unilateral and had nothing to do with your husband. You can feel a little more at ease, and there is generally no problem.