233 online school. Teacher Ren Yi's social work course is the training institution of 233 online course. 17 years, 233 online school is committed to building a brand of vocational education and providing textual research courses and services for candidates. The professional level examination for social workers is jointly organized by the Ministry of Civil Affairs and Ministry of Human Resources and Social Security, aiming at realizing the specialization and professionalization of social workers. They all organize exams in June every year and register in the human resources network of this province (see the website of this province for details). The requirements for the registration of social workers are very strict, specifically: professional and technical personnel engaged in specialized social services in social service institutions such as social welfare, social assistance, social charity, rehabilitation of the disabled, special care and placement, health services, youth services, and judicial correction.