The number of local children in the park is divided by the total number of local born children aged 3-6. In China, one-year preschool education refers to children aged 5-6, and the gross enrollment rate refers to the ratio of the actual number of people entering the park to the number of people who should enter the park. The algorithm of gross enrollment rate of preschool education in three years is the number of local children in the kindergarten divided by the total number of local children born between 3 and 6 years old. The gross enrollment rate of preschool education refers to the proportion of preschool education in the population of the age group stipulated by the state.