24 solar terms's entry into the Western Han Dynasty contributed a lot to astronomers.

"Spring rain surprised spring clear valley days, summer full mans summer heat connected. Autumn frost, winter snow. " This is the "Twenty-four solar term song" recited by China people since childhood. 165438+1October 30th, the UNESCO Intergovernmental Committee for the Protection of Intangible Cultural Heritage formally passed a resolution to include the "24 solar terms" declared by China in the UNESCO representative list of human intangible cultural heritage. Speaking of the "24 solar terms", it is also related to a celebrity in Qingdao history. He is Xu Wanqi, an astronomer in Jimo (now Pingdu) in the Western Han Dynasty.

Xu Wanqie (born in the heyday of Hanwu, living around 100 BC), as an expert in ancient Chinese astronomical almanac, was the earliest recorded and conclusive Pingdu celebrity, and his deeds were recorded in the History of Pingdu by Ban Gu.

Twenty-four solar terms originated in the Yellow River Basin. As early as the Spring and Autumn Period, four solar terms were set, namely, mid-spring, mid-summer, mid-autumn and mid-winter. After that, it has been continuously improved and perfected. By the Qin and Han Dynasties, the 24 solar terms had been completely established. When it was extended to Emperor Wu of the Han Dynasty, the long-used Zhuan Xu Calendar had a great error and was difficult to use again. Emperor Wu of the Han Dynasty adopted the suggestions of Sima Qian, Gong Sunqing and Hu Ai, and ordered them to organize discussions and create a new calendar. The official in charge of calendar calculation gave her a surname (this person's surname is shooting, and her surname is "Shi"), so she chose more than 20 folk calendar managers such as,,, and. After long-term astronomical survey, repeated precise scientific calculation, repeated correction and revision, they finally created a brand-new calendar, which was renamed "Tai Chu" by Emperor Wu of the Han Dynasty. This calendar is the famous taichu calendar method.

At the beginning of using taichu calendar law, it was constantly made difficult and vilified by conservative forces. Zhao Hanyuanfeng's three years (78 BC) finally triggered a large-scale debate, which began in November of the third year and ended at the end of the sixth year. The final conclusion is: "taichu calendar is the first", and especially points out that "Jimo (now Pingdu) Xu Wanqie and Chang 'an Xu Weili are the first. This paper makes a fair evaluation of taichu calendar Law and its creators' achievements.

(Reporter Pan Xiulei, Chen Yong correspondent Tan)

Related links >>& gt

The 24 Solar Terms

The ancients in China divided the sun's annual trajectory into 24 equal parts, and each equal part was called a "solar term", collectively known as the "twenty-four solar terms". Specifically, it includes: beginning of spring, Rain, Sting, Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, beginning of autumn, Chushu, Bailu, Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold. In order to facilitate memory, people made up twenty-four solar term song. With the spread of China calendar, the 24 solar terms have now spread to many parts of the world. In China's vast geographical space and long historical years, the 24 solar terms have given birth to rich and colorful folk culture. Proverbs, folk songs, poems, legends, Qufu and other literary expressions, handicrafts, calligraphy and painting and other works of art, folk customs with distinctive regional and national characteristics, etc. * * * have injected endless cultural vitality into the 24 solar terms.