A primary school is a school where people receive primary formal education. It is an important part of basic education and belongs to the category of nine-year compulsory education. With the development of society, kindergartens have opened in front of it. 3-6 years old are kindergarten-age children, and 6- 12 years old are primary school-age children. At present, the length of primary education is 6 years (5 years in a few places). After the primary education stage, it is the secondary education stage, that is, from primary school to junior high school (junior high school for short).