Why did the ancients in China advocate yellow?

Yellow is the color of the ancient emperor of China, and purple is the color of the ancient Japanese royal family.

China has advocated yellow since ancient times, and the legends of "Nu Wa made man from loess" are recorded in Huainanzi, Shan Hai Jing and Taiping Yulan. The descendants of these "loess" are the descendants of the Yellow Emperor. The cradle of their growth and reproduction, the Yellow River, and the yellow land cultivated for thousands of years ... have made the Han nationality have an indissoluble bond with yellow since ancient times.

The ancients believed that yellow was the color of the land, representing the unchangeable color of nature and the beauty of virtue. "Yellow is neutral, natural and eternal" (Ban Gu, White Tiger Yi Tong). So people use yellow to represent the "earth" in the five elements and the "middle" in the five parties. "Yellow is the positive color of the central soil." (Zhu) Yellow symbolizes the place where everything grows and represents the central imperial power and the country. Yellow has the symbolic significance of sacredness, dignity, loftiness and solemnity.

Therefore, the ancient emperors all wore yellow robes and sat on the throne of Huanglong chair. All the decorations and carriages in the palace are also "yellow cars" and "yellow houses", as well as Taoism, which has a far-reaching influence on China culture.