Preschool seems to be the last year of kindergarten, which is set up to adapt to children's primary education. It seems that it has not been recognized by official documents and belongs to a self-selected learning institution.

So in all kinds of educational laws and documents, I didn't find any specific provisions about preschool. Maybe I didn't read them carefully. Here are some laws and documents for LZ's reference.

Decision on the reform of the education system

Education note 1958

Decision of the Central Committee on the Reform of the Education System 1985

Outline of Education Reform and Development in China 1993

Decision of Central the State Council on Deepening Education Reform and Promoting Quality Education in an All-round Way 1999

Decision of the State Council on the Reform and Development of Basic Education 200 1

Ministry of Education's Action Plan for Revitalizing Education in 2003-2007

Outline of National Medium and Long-term Education Reform and Development Plan (20 10~2020).