What does the combination of yin and yang mean?

The concept of Yin and Yang originated from the ancient people's view of nature in China. The ancients observed various opposing and related natural phenomena in nature, such as static phenomena such as heaven and earth, sun and moon, day and night, cold and heat, men and women, up and down, and dynamic phenomena such as rain falling from the sky, moonlight in the sun, day and night, cold and heat, men going up and down. And summed up the concept of "Yin and Yang" in a philosophical way. As early as the Spring and Autumn Period, Yin and Yang were mentioned in Yi Zhuan and Lao Zi's Tao Te Ching. The theory of Yin and Yang has penetrated into all aspects of China's traditional culture, including religion, philosophy, calendar, Chinese medicine, calligraphy, architecture, divination and so on.

Yin and Yang are a division or subdivision of "unity of opposites or contradictory relationship", both of which belong to the same species. Harmony (1) Harmony is the name of the god who symbolizes the love between husband and wife in ancient China mythology. (2) Harmony means harmony, tranquility and harmony; Harmony refers to combination, integration and cooperation. China's harmonious culture has a long history. Both Oracle Bone Inscriptions and Jinwen have the words "harmony" and "harmony". The original meaning of harmony is the corresponding harmony of sound; The original meaning of closure is the closure of upper and lower lips. During the Yin and Zhou Dynasties, harmony and harmony were a single concept, which had not been combined. The Book of Changes and every two words have different meanings, but they are not seen. Harmony in Shangshu refers to the handling of many conflicts in society and interpersonal relationships; Fingers are consistent.