2. Liezi (about 450 BC-375 BC) was named Yu Kou, also known as Kou, and the word Yun was also known as Kou. Representative figures of Taoism in the early Warring States period. Putian, a native of Zheng (now Zhengzhou, Henan), was born after Shan. About the same time as Zheng. One of the ten outstanding figures in pre-Qin Dynasty, Taoist, thinker, philosopher, writer and educator.
Liezi is an important successor of the Taoist school between Laozi and Zhuangzi, and another representative of the Taoist school outside Laozi and Zhuangzi. His knowledge originated from Huangdi and Laozi, and he advocated that inaction should belong to Laozi and Zhuangzi, and was respected as a predecessor by Taoism. The pre-Qin school of philosophy (Liezixue) was founded, which had a far-reaching influence on later philosophy, aesthetics, literature, science and technology, health preservation, music and religion.