Just because WeChat can see each other's signature information doesn't necessarily mean that he is your friend, because WeChat provides different privacy setting options. In WeChat, users can freely set their own privacy rights, including whether to allow their friends to view their personal information and friends circle content. If the other party sets the privacy right to public or allows friends to view it, he can see his signature information. However, if the other party sets the privacy right to private or only to a specific friend, even if you are his friend, you can't see his signature information.

In addition, WeChat also provides a friend circle blocking function. Even if the other person is your friend, if he blocks you in the circle of friends, you can't see his signature information.

Therefore, whether WeChat can see the signature information of the other party depends on the privacy settings of the other party and your relationship with the other party. With the continuous expansion, privacy protection is becoming more and more important in modern social networks. Users should fully understand various privacy setting options and make appropriate settings according to their own needs to protect personal privacy. At the same time, we should also respect other people's privacy choices and don't infringe on other people's personal information excessively.