Mr. Chen Heqin is a famous preschool educator in China. He opposed the death education of burying human nature and reading dead books. During the Anti-Japanese War, he established the theory of "life education" with the mission of experimenting with new education. This theory mainly consists of three parts: (1) teleology: being a person, being a China person and being a modern China person; (2) Methodology: Learning by doing, learning by doing and making progress by doing; (3) Curriculum theory: Nature and society are our living teaching materials. Mr. Chen Heqin's life education system has had a great and far-reaching impact on all aspects of preschool education in China. Therefore, the correct answer to this question is A.