Why does China attach so much importance to immigration?

One of the reasons for refusing a visa is that you tend to emigrate, and the other is that you are not married, so the visa officer will tend to be with Americans, marriage immigration and the United States. It is unlikely that a single girl will succeed in getting a visa, and you have no previous experience in going abroad, which will inevitably leave the impression that you want to stay in the United States. Besides, you haven't made it clear why you went to America. It is more convenient for you and your friends to live in America. If you apply for an American visa next time, you'd better tell the visa officer what you want to do and how long you want to stay in the United States, and prepare materials to prove that you love your country very much. Your family is here and will be back on time.