Kindergarten is a pre-school education institution focusing on the care and education of young children, and usually accepts children aged three to six. Kindergartens can relieve the bondage of time, space and environment when families are cultivating children, so that children can develop physically and mentally healthily. Kindergarten education is the preparatory education for children and the foundation of the whole education system, including basic education courses and various activities. Kindergarten large class refers to the last year of children aged 3 to 6 who have studied and lived in kindergarten for three years, mostly referring to children aged 5 to 6.