Primary school is a school where people receive primary formal education and an important part of basic education. With the development of society, kindergartens have opened in front of it. Generally, children aged 6- 12 are of primary school age, and the length of primary school education at this stage is 6 years (or 5 years in a few places). The primary education stage is followed by the secondary education stage. Primary schools are included in nine-year compulsory education, and primary education is free of charge.