My QQ friends' trends are related to me. From time to time, strangers @ mentioned me, with different numbers. How many times have they all said advertisements?

This may be a new way to cheat users' personal information. Usually, these strangers will mention you in your news, and post some advertising information to lure you to click on links or download some applications to get your personal information or install malicious software. I suggest that you don't click on these links easily, and try to use QQ privacy protection tools to limit the access rights of non-friends. You can also blacklist these unfriendly users and report them.