There are rules in everything.

1. The sky remains the same, the land is not easy, and spring, summer, autumn and winter are more festive.

-"Pipeline, situation"

2. Everything is reasonable, easy to go with, but difficult to go against.

-[Song] Quotations from Cheng Hao

3. the degree of yin and yang, the change of the sun and the moon, the cold and heat, and the day and night are all the same.

-[Song] Quotations from Cheng Hao

The longer and more civilized the wealth of heaven and earth, the more extravagant it must be.

-Zhang Taiyan "After Reading Guan Shu"