You can go up and say hello. Generally, when you meet them for the first time, there won't be much conversation. Leave your contact information. They will all give it to you. They also learn Chinese. Take it easy. They all sneaked out. It's convenient to meet local people. I'm sure I want to make friends with you, but I usually ask you to help them with something. Why do I have more than n foreign friends? If you are a girl, it will be miserable, unless you are beautiful, and if you look ordinary, then all they can think of is you.