The way to know people is nothing more than socializing. Universities and society are the same, but the social ways in universities may be limited in limited ways, such as communicating with people in classes, communicating with people in departments, attending community gatherings, group dinners, participating in organizational activities, and sending life to friends. In short, it is to go out and meet more people, not just classmates, but to meet friends through friends and expand social circles, outside the profession and outside the hospital.