An advertising campaign that provides free services. Public service advertising is an advertising activity that provides free services to the society for the purpose of non-profit, and the public service advertising in Yuexin era refers to the advertising activity that provides free services in Yuexin era. This activity promotes students' mental health knowledge, enhances students' mental health awareness, creates a good campus psychological and cultural atmosphere, provides more psychological care for students, creates a good mental health education atmosphere in our school, and helps students establish a correct mental health concept, improve their psychological quality and create a happy life.