Simple. According to official website information of Songjiang Education, Songjiang Sanxin Primary School requires all school-age children and adolescents over 6 years old (including 6 years old) to bring information with their parents, and to enter the school nearby without examination and complete compulsory education. Migrant workers also need to provide proof of work to register. So Songjiang Sanxin Primary School is easy to enter. Songjiang District, located in the southwest of Shanghai, is located in the upper reaches of Huangpu River, bordering Minhang District and Fengxian District in the east, Jinshan District in the south and southwest, and Qingpu District in the west and north.