For example, start with Weibo who pays attention to people who may know you.
Or look at your WeChat, QQ, Momo, etc. Through your Weibo information and so on, and then enter the space. Or through pictures, Baidu, etc., these are all legal, such as Baidu checking your QQ number.
It is possible to know your name, your mobile phone number, your home address and so on.
So in this era, we should pay attention to the confidentiality of our information.
The Weibo user you mentioned may not check you through the background in Weibo as you think, and it is impossible for Weibo to provide such background query for the public to inquire at will, unless it is necessary for handling a case.
Professionals fight for you.
Please adopt