中庸
Zisi was the son of (伯鱼) and the only grandson of Confucius. He is traditionally accredited with transmitting Confucian teaching to Mencius and writing the "Doctrine of the Mean", "Biaoji" 表記, "Ziyi" (The Black Robes") 緇衣, and "Fangji" (The Record of the Dikes) 坊記, presently chapters of the "Liji". (Since Zisi's dates of life do not overlap with those of Mengzi, it has been suggested that the intermediary role in the transmission was played by Shi Shuo 世碩.)