It is another name for "day" in Taoist language. In China, people refer to gold, wood, water, fire, earth and nine planets. How (the sun), Wang Shu (the lunar calendar) and Luo Hou dominate the world.
Wen Zi's Ninth Birthday: "Laozi said: People are born because of the change of heaven and earth, with blood in January, blood in February, blood in March, pregnancy in April, muscle in May, bone in June, shape in July, movement in August, impatience in September and birth in October. The five internal organs are tangible, with the liver dominating the eyes, the kidney dominating the ears, the spleen dominating the tongue, the lung dominating the nose and the gallbladder dominating the mouth. The outside is the outside, the middle is the inside, and the head is like the sky. There are four seasons, five elements, nine solutions and 360 days. Man has four branches, five internal organs, nine orifices and 360 knots. It's stormy, cold and hot. "