If a classmate becomes a colleague, his identity and role will change, which has advantages and disadvantages according to different situations. If it is a cooperative department, because they are familiar with each other, the work cooperation may be smoother. If classmates are incompatible, it is difficult to cooperate well at work. In addition, the competition at work may "challenge" the feelings between classmates. In case people in the workplace really encounter this situation, how to properly grasp the distance between them? "To distinguish between work and life, don't confuse emotional factors with work too much, and proceed from a professional and fair attitude at work. At the same time, be careful not to' publicize' something about each other in the office. Finally, we must maintain a good attitude, that is, ensure healthy competition, share work experience, and let both sides make progress together. " If students become a superior-subordinate relationship, no matter which side, in this dual role, we must establish a good attitude and distinguish between work and life occasions. Since the two sides established a good foundation for cooperation when they were students, subordinates should give more timely and powerful support to their superiors in their work, and superiors should also give more reminders and help to their subordinates. Students should try not to work in the same group, after all, competition will affect personal friendship. If you join the same company, HR should also consider placing them in a cooperative department to avoid competition. In addition, give them proper education and training, establish a good working atmosphere, and let both sides grow up in a fair environment.