Origin: Initiated by the Department of Psychology at Beijing Normal University in 2000, it was designated as a national Mental Health Day by the Central Committee of the Communist Youth League and other departments in 2004. Initially targeting university students, it gradually expanded to include middle school students. The homonym for "525" is "I love myself." Its core message is: cherish life, care for yourself, learn to accept yourself, pay attention to your own mental health and spiritual growth, and in turn, better love others and society.