Lean education focuses on the research and teaching practice of ability connection, psychological preparation, habit formation and knowledge reserve of children aged 5-6, aiming at providing preschool education for the majority of school-age children that conforms to the law of children's physical and mental growth, solving the common problems that many children can't adapt to the environment quickly, accept high-intensity knowledge learning and even have no good living habits after entering primary school, and helping them through the first turning point of their lives.