The author thinks that there are five kinds of possible explanations about the dialogue between Zhuangzi and Huizi.

Whether and how it is possible to communicate and understand between different subjects? In reflecting the “being” of the humans, Zhuang Zi makes a multiple investigation on it, and it is firstly embodied at the debate of Hao-Liang.

The Haohe river bottom putty environment quality present situation and the change tendency study;