The judgment of phenology in the 24 solar terms is the same as other countries.

It's similar to their own solar term-"Zodiac".

Western countries take the zodiac as the criterion, and the time division in the zodiac is actually based on China's twelve qi.

Everyone in their family has a starting point, a total of twelve. And their twelve starting points are exactly the same as the twelve China Qi in our twenty-four solar terms. At the same time, the time division of the zodiac is based on China's twelve qi, so it is also very accurate. It's just that they don't continue to divide, but take the zodiac as the criterion.

In fact, China's "24 solar terms" have been constantly improving and perfecting. At the end of Ming Dynasty and the beginning of Qing Dynasty, two missionaries, Tang Ruowang and Xu Guangqi, invented the method of "fixing qi" according to the degree of the zodiac in Chongzhen almanac. Because the Yellow River meridian is a constellation every 30 degrees, this method starts from the vernal equinox, and every time the Yellow River meridian crosses "15 degrees" when the sun is running, it is a solar term. It is more accurate to divide solar terms in this way, because the degree of the yellow meridian in solar terms is an even multiple of 15.