There are many topics suitable for preaching to college students. For example, in terms of political beliefs, we can tell them some proletarian political ideas, help them establish a scientific world outlook, outlook on life and values, and let them firmly establish their feelings of home and country, and they can't betray the party and the country. Secondly, we can preach the theme of learning to them, so that they can firmly establish the belief that learning can still change their destiny. Although learning is not the only way, learning is still a more effective way. Then, you can preach the relevant knowledge of the concept of marriage and love to college students. Help them establish a rational and scientific concept of marriage and love. Because in modern society, with the continuous opening of social concepts, the problems about love that often appear among college students are more common. Chess should help them establish a scientific concept of love and objectively and rationally analyze the relationship between male and female friends. There is another theme that can be preached to them, that is, respecting the elderly, because they go to college outside and seldom go home, so they should strengthen their contact with their parents at ordinary times and help them do something they can when they get home.