The core contents of the connection between the old and the young are knowledge transition, ability transition, habit transition and psychological transition. It mainly includes knowledge of language cognition, number base and space. Self-care ability, learning management ability, safety protection ability, social communication ability. Living habits, study habits, sleep habits, hygiene habits.

The connection of preschool education refers to the connection between preschool education and primary education. Children in kindergartens and primary schools have different physical and mental development characteristics. Solving the connection problem between preschool education and primary education is of great significance for promoting people's sustainable development and improving the quality of education.