Why is Tmall Elf's mind reading so accurate?

In fact, this is just using some skills of big data and some ancient tricks, that is, matching your usual browsing information records on the Internet with your consumption habits records, and combining the information such as faces and constellations that have been circulated. The most important thing is that when you do this link, most people will put their usual personality and things they encounter in the right place, and ignore some places that are not right, which will naturally feel very accurate! This is the so-called "if you believe, you will have;" If you don't believe it, you will! "