College students in Tongnan should be isolated when they return to China. When college students go home on holiday, it is best to stay at home for more than 5 days. Because the epidemic situation is very serious everywhere now, and college students basically go home by bus, meet all kinds of people, and the means of transportation are confined spaces. Therefore, it is best to isolate after going home, and it is best to check twice every three days, and be responsible for yourself and others.