1. International students who have graduated from high schools in the United States cannot apply for domestic universities if they hold China passports. They can only return to China before signing up for the national unified college entrance examination.

2. International students who have graduated from high schools in the United States can apply to domestic universities and submit their applications directly to their favorite universities in official website, but not all universities can accept international students. For specific requirements, please refer to the application methods, procedures and requirements published by official website, the International College of each university. Different universities have different requirements.

Generally speaking, it is not recommended to go back to university. You can consider applying to universities in Hong Kong and Macao.