People give numbers a specific meaning. Many people hate 13. A newly-built office building will have a floor of 12A, but this floor is actually 13. Almost all goods related to numbers are 8 expensive and 4 cheap-of course, there are also many individualists holding many mobile phones with the number 4, claiming: I am engaged in music ... and people's emotional bias towards the number 7 is not as absolute as that of 8 or 4. Sometimes it's not very good. We players often hear the waiter explain that this number is cheap because it "has 4 bands and 7 bands". Sometimes, 7 is good. Wenzhou people with good business experience like 7 or even more than 8, because they believe in "seven ups and eight downs", and 7 stands for "seven ups and eight downs", which is progress. Even many Americans are interested in 777, because the combination of 777 in most casino slot machines is a good number, and it is also related to 2 1 minute on the table. The worship of "7" originated from the ancient society where primitive astronomy was extremely backward in productivity and science. The ancients hoped that the mysterious starry sky could tell them something. The ancients believed that people had something to do with the stars, and the human soul was a part of the sky. So astrologers played a very prominent role in ancient society. The Sumerians, who founded the kingdom of Babylon, believed that all seven Obis were gods and worshipped them. I am convinced that they rule and dominate the changes of the world in turn. As a result, the ancestors of the Semitic people evolved their reverence for the Seven Stars into their ancient religion. They built seven altars, offered seven sacrifices and made seven prayers ... Day after day, year after year, gradually, "seven" was abstracted from their devout totem worship etiquette, became a grand symbol, and finally integrated into the new monotheism. This traditional cultural influence has developed to modern times, so the word "7" has become a sacred and mysterious number in English-speaking countries, which has a wide and far-reaching influence on western culture and even the whole world culture, and it affects all aspects of people's work and life. For example, there are seven Greek sages, seven archbishops, seven virtues, seven capital crimes, seven heavens, seven gifts from God, seven sacraments, seven patrons and seven good deeds. All these fully reflect the extensive application of "Seven" in religious culture. "7=2+5" China made even higher achievements in astronomy. Sumerians generally called the sun, the moon and the five planets (the ancients only knew the five planets through naked eye observation) as planets. Obviously, it is because these seven celestial bodies are constantly moving relative to the star background. China, because of its more advanced astronomy, has distinguished the sun and the moon from the five planets. This difference is also reflected in their respective cultures. Babylonia produced "Seven Yao auspicious days", while China developed "Yin (lunar calendar-moon) Yang (sun) five elements (gold, wood, water, fire and earth)". The Semites regarded the seven obsidians as gods, while the ancients in China attached "Jin Mu's theory of fire, water, soil and five elements" to the five planets for the sake of "harmony between man and nature". Sumerian tribe values "seven" and regards "seven" as "multiple" and "complete", while China culture applies the theory of five elements to all aspects of society: "things have five elements", "people have five elements to destiny", "dynasties have five elements to phase" and "orientation has five elements to return to". Almost everything can be applied to the theory, unearthed in Mawangdui, Changsha. In China's traditional culture, Qi is actually the sum of Yin and Yang and five elements, and it is a harmonious state of Confucian Tao or Taoist Qi, both of which are closely related to goodness and beauty. Re-understanding the "7" in life Looking at China traditional culture and western culture, the meaning of "7" is auspicious, auspicious, noble and broad, which represents the combination of ancient natural science and technology and humanities. In fact, it doesn't matter whether it is expensive or cheap. Numbers, after all, are just a code name for the convenience of life, so are 7 and other numbers; From the scientific outlook on life, it is the material entity behind the numbers that deserves our attention. This figure adds up to seven.