In the book of I-ching, a point is mentioned, there are similarities and differences in wuwei , they coexist with effects and influence on each other, the mutuality create heaven and earth. The so-called "mutuality" means complementing each other, cooperating with each other, being intimate and harmonious. The purpose of this work is to explore the relationship between the two things. Maybe they represent two cities or two cultures, two perspectives, and so on. There are so many possibilities. The form of this work is marked by the Western graphic composition design, and the traditional Chinese natural printing and dyeing technology. This is an explanation of "mutuality".