Job Recruitment Website - Immigration policy - Does anyone know what OISC institutions in Britain do?

Does anyone know what OISC institutions in Britain do?

OISC stands for Office of the Commissioner for Immigration Services.

"Is an independent person in charge established according to the fifth part of the Immigration and Asylum Law of 1999" """"The relevant qualifications can be found on the foreign supervision information network of the Ministry of Education of China.