You have the same working ability as your colleague Xiao Liu, but the leader gave you the opportunity to study in the mainland. Xiao Liu is very unhappy. What should you do?

Study harder and improve yourself. When he is unhappy, he doesn't realize his shortcomings because of his bad mentality, so don't worry about the rest. People can't satisfy everyone, and taking care of others everywhere is doomed to suffer indignities. If it were me, I would try to prove myself.