How to calculate the ambush war in Sangeng on the summer solstice?

On the third day of the summer solstice, count three volts: July 16, and it is "three volts" for 40 consecutive days.

Summer solstice. The solstice soon after summer is the dog days. As the saying goes, "counting from the third Geng day of the summer solstice" means that counting from the summer solstice to the third Geng day will enter the initial stage, that is, the first day of squatting. Astronomical science experts said that the third "Geng Day" from the summer solstice in 2022 is July 16, which means that this day is autumn.

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Volt, marking the hottest period of the year, as the saying goes, "heat is at three volts." Lin Yuan, a member of the Chinese Astronomical Society and an expert in astronomical science in Tianjin, said that the date of Fu was calculated according to the date of the main branch. In ancient China, 65,438+00 words of a, b, d, e, g, n and n were called "heavenly stems", while 65,438+02 words used by Zi Chou Mao Yinchen at noon were called "earthly branches".

Stem and branch are the floorboards of heavenly stems and earthly branches. A word in the heavenly stems and a word in the earthly branches are matched with each other in order, and there are 60 combinations, which are often called "Sixty Jiazi". Branches and branches were originally used to record days, and later they were used to record years, months and times.