What should I do if I receive a letter from an American immigrant?

If it comes to this, I'll inform you in two or three months. All immigrants are handled at the Guangzhou Consulate. Just pay attention to dress etiquette and other basic questions during the interview, and of course, don't forget to bring all the information needed for the interview. I can't tell you the specific questions, because there are no standard questions in American face-to-face visas, which are all asked by visa officers according to their needs. You just have to answer according to the real information you submitted. Almost all visa officers can speak Chinese, and a few who can't will translate for you, so you don't have to worry.