What are the three chronologies in ancient China?

1, year, year, year China was originally based on the year when the king ascended the throne, such as the first year of Zhou Xuanwang and so on. Liu Che, Emperor Wu of the Han Dynasty, began to use the year number, which was called the first year of Jianyuan when he ascended the throne, followed by two years of Jianyuan and three years of Jianyuan. When that year changes, it will be a new era.

2. The chronology of cadres and branches is one of the most basic chronologies in ancient China. Since the thirty years since the establishment of the military by Emperor Guangwu of the Eastern Han Dynasty, official support has been officially used in chronology. Chronology of branches and branches is widely used in ancient Chinese medicine books.

3. The Year of the Stars During the Warring States Period, astronomical astrologers had a so-called year of the stars according to the astronomical chronology. Stars refer to old stars and old people refer to old people, so there are chronologies of old stars and old people.