College students apply for isolation for free. College students in Gansu Province are isolated free of charge with their student ID cards. The low-risk areas in other provinces without stars are isolated for 3 days at their own expense, and college students are isolated free of charge with their student ID cards. If there are stars and green codes, they should be isolated for 7 days and isolated at home for 3 days. Some cities need 7+7 isolation and home, and do nucleic acid testing on time.