I. Assessment of suicide 1. History of self-harm or suicide attempts. 2. Patients with mental disorders with symptoms of self-blame, self-guilt, command-line hallucinations, and compulsive thinking. Anhui Mental Health Prevention and Treatment Center, Child and Adolescent Psychology Department, Hui Zhong 3, recent major life events such as the death of a loved one, serious physical and psychological trauma. 4, in the diary flow of pessimism about life. 5, directly say “I want to die”, or use metaphorical language to say “you will never see me again I’ll pay you back in my next life”, “Help me take care of my parents (or close friends, pets, etc.)”, “I’m no use to anyone”. 6.Sudden improvement in mood after a long period of severe depression. 7.Has formed a special plan to commit suicide. 8.Discusses suicide with people, makes jokes about suicide, collects information about suicide, or wanders into rivers, seas, tall buildings, cliffs, bridges, etc. 9.Has a serious illness or a history of failed medical treatment. 10.Disposes of personal belongings, presents beloved things to relatives and friends, pays off all borrowed things or 11.Frequent accidents or dangerous behavior. Suicide prevention and intervention should be given full attention to children and adolescents who are susceptible to suicide, and preventive measures should be taken to reduce or avoid the possibility of suicide by paying attention to the development of good psychological prevention mechanisms from childhood, setting appropriate life goals, preventing physical illness, eliminating substance abuse, and detecting and treating mental illness early. Prevention of re-suicide for those who have attempted suicide. Special attention is paid to specialized interventions for children with psychiatric disorders, personality disorders, psychoactive substance dependence, and those in long-term distress. For attempted suicides with psychological factors as the main focus, prevention of repeat suicide can be achieved through mutual support groups for attempted suicides or participation in volunteer suicide prevention activities.