5 square meters. According to the relevant public information, the classroom area is 6 12 1 m2, the corridor area is 1784 m2, and the staircase area is 5 m2, which is more suitable. Kindergarten, formerly known as Kaner Garden, is a system introduced from Prussia hundreds of years ago, formerly known as Mongolian Garden and Kindergarten. This is a preschool education school. According to the Regulations on Kindergarten Work, kindergartens are institutions that protect and educate preschool children over 3 years old. Kindergarten-age children are generally 3 to 6 years old.