What are the four dating methods of Huangdi?

There are four important chronologies in the history of China:

(1) chronology of trunk and branches. The trunk branch is a combination of heavenly stems (A, B, D, E, G, E) and earthly branches (ugly Mao Yinchen has been in Shen You at noon). Taking the ten-day trunk and twelve earthly branches as a cycle, it can be combined into sixty groups, commonly known as "Sixty Jiazi", which is used to represent the calendar and will be repeated 60 years later.

(2) the year of the emperor. Fourteen years after the Western Zhou Dynasty, the sayings of "one year in Wang Xuan" and "two years in Wang Xuan" appeared in the history books of the Zhou Dynasty. Lu's Spring and Autumn Annals is a fourteen-year history from Lu Yinnian to Lu Aigong. Posthumous title, whose "Wang Xuan" and "Yin Gong" are emperors or vassals, is the calendar year of the emperor.

(3) year and year. In BC 14 1 year, Liu Che, Emperor Wu of the Han Dynasty, ascended the throne and created the title with the title "Jianyuan". After that, emperors imitated him and established their own titles. During the three years from Emperor Wu of the Han Dynasty to Xuan Tong in the Qing Dynasty, more than 600 titles of emperors were established in 205 1 year.

(4) Chronology of the Yellow Emperor. During the Revolution of 1911, in order to oppose the Qing Dynasty, some newspapers and revolutionary parties did not use the title of the emperor of the Qing Dynasty, but used the legendary ancestor of the Chinese nation, Huangdi, as the title, which was called "Huangdi Chronology" in history. Due to the different starting time of calculation, the yellow emperor chronology adopted by newspapers and periodicals at that time was also different. 19 1 1 year, People's Daily, the organ newspaper of China League, concluded that it was the year of Huangdi in 4609, Jiangsu, compiled by Jiangsu Association, a foreign student in China, concluded that it was the year of Huangdi in 4402, and Huang Zao concluded that it was the year of Huangdi in 4622. Among them, the time used by People's Daily was accepted by most revolutionaries, and the proclamation issued by Hubei military government after Wuchang's first righteousness was based on this, and the proclamation of the provinces in response to the uprising also adopted this statement. When Dr. Sun Yat-sen became the interim president, he electrified all provinces and set the calendar year of the Yellow Emperor as 165438+ 10/3 (A.D. 1 9/265438+10/0/kloc-0). From this day on, the calendar of the Yellow Emperor will no longer be used.