How can exchange students stay abroad? (how to do it specifically? )

First of all, it depends on whether you are an exchange student in junior high school or a high school. If it is junior high school, it is not necessary. You can go back to China first, stay in senior one and senior two, and then go through institutions or schools (there are still few schools that can run exchange programs). If you are an exchange student in senior three and want to stay abroad, you must get a college admission ticket from your own country, and then go back to China or renew your visa to stay abroad through the university, but the regulations in different countries are different.