Zhou Dunyi
Secondly, the men set out to undermine any links, real or otherwise, between 4th-century Confucianism and what they viewed as inferior philosophical schools of thinking, namely Buddhism and Taoism. Other loosely connected members of this so-called network of thinkers include: Cheng Yi, Zhang Zai, Cheng Hao (程顥, 1032–1085) and Zhou Dunyi. Central to each of these men was the ancient text "I Ching", which each had studied closely. The way in which Shao studied this ancient text, however, differed from the other members.