Tai Xuan said: there are nine days, one is the sky, the other is the sky, the third is the sky, the fourth is the sky, the fifth is the sky, the sixth is the sky, the seventh is the salty sky, the eighth is the sky, and the ninth is the whole day. Again, heaven is too mysterious to see anything.

Just Xuan Jing said: "Nine days means one day, two days, three days, four days, five days, six days, seven salty days, eight days and nine days."

Er Ya said: The sky is the sky, the sky is the spring day, the summer day, the autumn day and the winter day.

Lu Chunqiu says: There are nine wild fields in the sky. What are the nine wild fields? The Central Committee said "Jun Tian", the East said "the sky" and the Northeast said "the weather changed". In the north, it is called Tian Xuan; In the northwest, it is called Youtian; In the west, it is called Haotian; In the southwest, it is called Zhu Tian; In the south, it is called sunny; In the southeast, it is called sunny day.

Huainanzi said: "Jun Tian is called in the center, Tian in the east, Mo Tian in the northeast, Tian Xuan in the north, Youtian in the northwest, Zhu Tian in the west and Suntian in the south.

Extended data:

During the Spring and Autumn Period, Laozi combined the great wisdom of ancient sages and sages. Summarized the essence of ancient Taoist thought and formed a complete and systematic Taoist theory, which marked the formal formation of Taoist thought. It has a profound influence on China's philosophy, literature, science and technology, art, music, medical care and religion.

Needham said: "Many of the most attractive factors in China's personality come from Taoist thought. Without Taoist thought, China is like a tree, with deep roots and luxuriant leaves, rotting away. " "Taoist thought is the foundation of China's science and technology" and "(Taoist philosophy) is crucial in the history of science in China"

Taoist philosophy is called the cornerstone of China culture, and it has been reflected in different degrees through Confucianism and Buddhism after China.

Taoism takes "Tao" as the core, thinks that the avenue is inaction, advocates the nature of Tao, and puts forward political, economic, governing the country and military strategies such as Taoism, guarding men and women, and combining rigidity with softness. It has simple dialectical thought, is an extremely important philosophical school in "a hundred schools of thought contend", exists in various cultural fields in China, and has a great influence on the culture of China and even the world.

A large number of Chinese and foreign scholars began to notice and absorb the positive thoughts of Taoism, so scholars said: "Taoist thought can be regarded as the great product of the Chinese nation." It is the center of national thought and has the spirit of' the benevolent regards it as benevolence, the knower regards it as knowledge, and the people do not know it for daily use'. "

At the end of the Eastern Han Dynasty, Taoism, based on the Taoist thoughts of Huang and Lao, inherited the immortal magic of the Spring and Autumn Period and the Warring States Period.

Baidu encyclopedia-Taoism