The twenty-four solar terms originated in which valley of China?

1, "Spring rain surprises spring and bright valley days, and summer is full of mans and summer heat is connected. Autumn frost, winter snow. " This 24 solar term song, with only 48 words, contains the wisdom of the Chinese nation for thousands of years. In 20 16, Twenty-four Solar Terms was selected into the UNESCO Intangible Cultural Heritage List.

2. Twenty-four solar terms originated in the Yellow River Basin and are an important part of the China lunar calendar. The lunar calendar is a traditional calendar in China, and it has other names, such as "Xia Li" and "Hua Li", which is a combination of yin and yang. According to the position of the sun, the lunar calendar divides the trajectory of the sun into 24 equal parts and stipulates 24 solar terms. As early as the Spring and Autumn Period, the ancient sages of China set four solar terms, namely midsummer, midsummer, midsummer and winter solstice, and constantly improved and perfected them. By the Qin and Han Dynasties, the 24 solar terms had been completely established. Huainanzi in the early years of the Western Han Dynasty completely recorded the 24 solar terms with the same name as modern times. Taichu calendar, which was made in BC 104, officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms. The time when the sun runs along the longitude of the Yellow River from zero 15 degrees is called "a solar term". Running at 360 degrees every year, * * * experiences 24 solar terms, with two solar terms per month. Among them, the first solar term of each month is "solar term", namely: beginning of spring, Jing Zhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, heavy snow and slight cold; The second solar term of each month is "Zhong Qi", namely: rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great summer heat, early summer heat, autumn equinox, early frost, light snow, winter solstice and great cold. "Solar term" and "neutral gas" appear alternately, each lasting 15 days, and are now collectively referred to as "solar term".