Xiaohajin preschool institutions follow the rules of early childhood education and constantly innovate educational methods. Among them, the teaching materials and teaching aids of the project “Multiple Treasure Boxes” have been promoted nationwide in 2009, and currently include Beijing, Shanghai, Tianjin, Xiamen and Fuzhou. More than 1500 large kindergartens in 28 provinces, more than 60 cities and other places have been introduced and used by children. They have won the favor of children and received unanimous praise from parents and gardens, which has substantially improved the quality of teaching in kindergartens. Since its inception, Little Hajin has sent away more than 20,000 graduates. The first batch of children have been distributed to study or work around the world. Harvard, Yale, Cambridge, Peking University, Tsinghua, University of Tokyo, Central Academy of Drama , All have children who came out of Hazen.