If you had a bit of experience of living in China and knew how bad recruiters and bad school management turn on you to know everything about you, not respecting your privacy, and with the information they may get to use against you --- then you would probably understand the concerns.
Anyone Chinese in China pretending to be your "friend" could most likely be anything else than that.
Watch out, or you may be tricked in!
Here are many different kind of people around, and this includes quite a number of bad recruiters that you should beware of as well as some dishonest people who are running so-called "schools" that deserve to be placed in the Hall of Shame!
My advice: be very, very careful - it is good if these bad people I have in mind do not know everything! People like us should not help them to trick any of us in!