1. Shanghai Institute of Early Childhood Education, Shanghai Normal University, Shanghai 200234, China
2. Macquarie School of Education, Macquarie University, Sydney, NSW 2109, Australia
3. Faculty of Education, East China Normal University, Shanghai 200062, China
4. Faculty of Education, Beijing Normal University, Beijing 100875, China
5. College of Preschool Education, Capital Normal University, Beijing 100048, China