952 years ago today, on July 24, 1073 (June 17, 1073 lunar calendar), Zhou Dunyi, a philosopher of the Northern Song Dynasty, passed away. Zhou Dunyi (May 5, 1017 - July 24, 1073), formerly known as Dengshi, the word Maoshu, and the name Lianxi, was passed down as the 29th grandson of Zhou Yu, a famous general in the Three Kingdoms. A native of Yingdao County (now Daoxian County, Hunan Province), a Northern Song official, a theorist, and the founder of Confucianism in the Song and Ming Dynasties of the Northern Song Dynasty. It is the most important development of Confucianism after Confucius and Mencius, and has a profound impact on the history of Chinese thought. Comment: Zhou Dunyi is not only a famous Chinese writer, but also a famous theorist. His contribution to thought is greater than that of literature.