What do you mean it was built too many years ago?

Tai sui, the astrology founded in the era of the yellow emperor, is also called "taking pictures" At the age of 60, the running cycle is based on the branch and branch chronology of 60 Jiazi.

At the end of the Western Han Dynasty, Liu Xin sorted out twelve places where the old star stayed in the sky area according to ancient data, which were called "twelve times"; These "twelve o'clock" are: Xuanyi, Zhang Yi, Loulou, Liang, Shi Shen, quail head, quail fire, quail tail, birthday girl, fire and wood analysis. Tai sui Shen corresponds to 60 Jia Zi, and one person is on duty every year. Tai sui, who was on duty that year, was called "Tai sui", the son of heaven in the middle of the year, and was in charge of the good and bad luck of the world that year.

Monthly construction generally refers to twelve branches, such as Jian Zi, Jian Chou and Yin Jian. "Sword" represents the direction of the top of the bucket handle of the Big Dipper. In ancient astronomy, bucket handle and the Big Dipper were called "swords". Years old were divided into twelve days in the calendar, and bucket handle took turns to call them "December swords". December is a solar month based on 24 solar terms.

Extended data

Polaris is a bright star that appears in the northern part of the sky. It is very close to the north pole of the earth, almost opposite to the earth's axis. From the point of view of the earth, its position has hardly changed. Sailors and travelers often rely on it to tell their directions. Because the Big Dipper revolves around the North Star, the second Big Dipper is also used to tell the direction and set the season.

People can decide the season at the beginning of dusk according to the direction pointed by bucket handle-the Big Dipper: bucket handle points to the east, and the world is spring; Guide to barrel handle, it's summer in the world; Bucket handle refers to the west, and the world is autumn; The barrel handle refers to the north, and it is winter all over the world. Similarly, December can also be determined according to the different positions in the twelve days indicated by bucket handle and the Big Dipper. Take the northern day, when the sun is in the northern month, as an example. Beidou bucket handle refers to Chen as the "child" and the month when the child was born.

Bucket handle's "ugly" position on the day when the sun and the moon meet is to create an ugly month; On the day when the sun and the moon meet, the "yin" bucket handle refers to is the sword. By analogy, the day when the sun and the moon met in bucket handle refers to one of the twelve days, that is, the day when the moon was made, which is also called "making the moon". But with the passage of time, it is said that the ancients found that the Big Dipper gradually deviated from its original position, so they switched to twelve branches directly fixed on the equator.

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