A) The main function of peer educators is to help group members clarify their concerns and seek solutions by sharing information and experiences. He/she is the best person to spread the latest information and knowledge, and can set an example for others through his/her own behavior. At an age, he/she can understand and understand the emotions, thoughts, feelings and languages of participants, so he/she can communicate with them better.

B) Peer educators can not only teach their peers how to reduce harm, but also practice it through their own behaviors, thus influencing other members in the network to stay away from the harm of AIDS. They are more capable of motivating their peers to adopt healthy behaviors, because they have common shortcomings, advantages and experiences.