According to the recommendation of friends in the address book. Tik Tok needs to bind the mobile phone number when registering in real-name registration system. At the same time, Tik Tok will access your sim card information and address book information, and recommend people you may know. This is an easy thing to do in the era of big data.

For example, you bound your mobile phone number on Tik Tok, and Tik Tok visited your address book and found your friend A/B/CB/C. At the same time, your friend A/B/C also bound your mobile phone number on Tik Tok, so that Tik Tok can easily calculate that you are a friend of A/B/C. ..

Another situation is, for example, when you watch a pet video, you will like it very much and stay for a long time. After reading it several times, I may recommend more for you in the future. There are more beautiful women singing and dancing, and it is very likely that more beautiful women singing and dancing videos will be recommended later.