Wang Bi (226-249), a Wei Dynasty scholar, did a significant work in comparative study on Confucianism and Daoism. His interpretation of I Jing and Daode Jing created a new era for intellectuals of his time, and produced profound influences for ages to come. The essential idea of his work is heaven, earth, and all things in between are based on 'wu' (literally meaning non-being). For Wang Bi, wu means the formless and nameless rather than nothingness, while yu (being) signifies heaven, earth, and all things in between. He emphasizes the fundamental over the derived, and applies this idea to other topics. According to the author, Wang Bi evolves three basic ideas: (1) to forget the picture while grasp its meaning, (2) to value wu over yu, and (3) to affirm that social institutes are based on naturalness. Analysis of these ideas is key to the understanding of the thought of Wei Dynasty and the relation between Confucianism and Daoism.