Colorful Lianba, edited by Cheng Haijiao, is a synchronous textbook for primary and secondary school students and teachers. "Colorful Classroom" was initiated by the Central Committee of the Communist Youth League nationwide on October 20 165438 10, and the volunteer service activities carried out by grassroots volunteer service teams and volunteers around five service contents: academic counseling, family companionship, feeling the city, self-care education and love donation.