Zhihu can't leave his own WeChat?

Well, how can I put it? There should be such a situation, because now all accounts, such as QQ, WeChat and Alipay, belong to the real-name authentication in our real-name registration system. If we say, well, leave our contact information in some places that are not particularly safe, there may be people with ulterior motives, but now most software has very confidential measures, and he can protect us reasonably according to the specific needs of our users.