The solstice of summer has come. Guess what the ancients originally used to determine the 24 solar terms?

The solstice of summer has come. Guess what the ancients originally used to determine the 24 solar terms?

A. bucket handle is divided into the Big Dipper

B.where the sun sets

Correct answer: a

Answer analysis:

The Big Dipper, equivalent to the celestial emperor's car, runs in the center of the celestial sphere and controls four directions. People need to rely on the Big Dipper to distinguish Yin and Yang, define the four seasons of a year, establish the corresponding relationship of the five elements, adjust the solar terms and determine the twelve o'clock.