Educational institutions refer to places and educational administrative organs that carry out all kinds of educational work. Narrow sense refers to all kinds of schools at all levels. Broadly speaking: (1) schools of various types and degrees (such as ordinary schools and professional schools); (2) Preschool education institutions (such as nurseries and kindergartens); (3) Off-campus educational institutions (such as Children's Palace and Counseling Station), (4) Adult educational institutions (Correspondence College, TV University, Radio University, Adult Self-taught Examination Station, etc. ); (5) Educational administrative organs at all levels (Ministry of Education, Department of Education, Education Bureau, Education Department, etc. ); (6) Educational research institutions.