Kun, one of the eight diagrams of Zhouyi, means the earth; It also means smooth and unobstructed, and the flat terrain can carry everything. The terrain is Kun, the gentleman carries things with morality, and the gentleman's way is also. So are harmony, coordination and balance. "Laozi" has a saying: sound and sound are in harmony. There are all kinds of scenery and melodies in the world, whether it is benevolence, wisdom, hookah, birds singing, orchestral bamboo, if they are not harmonious and compatible, they will complement each other, live in harmony with * * *, and the world will be orderly. Heaven and earth are dry, and harmony is the way. He Kun, the vision of all beings, nourishes life with the meaning of heaven and earth and the wind of a gentleman.