Both of them are awesome. Zheng Yuxin and Wu Zhengxian are both experts in the field of primary school mathematics education, and they both have many bright spots worth learning. Among them, Zheng Yuxin is a professor in the Department of Mathematics of East China Normal University. His main research interests are mathematics education, curriculum and teaching theory. He has published a large number of papers and won many awards. He is also the host of many national and provincial-level projects with rich works. Wu Zhengxian is a special-grade teacher in Shanghai, and once served as the head of the primary school mathematics group in the teaching and research section of Shanghai Education Commission. Her concept of "children's mathematics education" is in the field of primary school mathematics education.