When did the twenty-four solar terms first appear in China? Who made up solar term song?

The author of the solar term song is. In BC 104, the twenty-four solar terms were officially set in the calendar, and the astronomical position of the twenty-four solar terms was clearly defined.

Deng Ping was a native of the early Han Dynasty, and served as an official during the reign of Emperor Wu of the Han Dynasty. In the Han Dynasty, China's calendar began to make a big turn, and the national unified calendar became an independent science and technology. Emperor Wu of the Han Dynasty ordered Liu Xin to write three calendars. The important feature of these two calendars is the integration of calendar and year. The whole number of days in a year is 365 days instead of 366 days in the previous calendar.

With what? Addition? Replace the previous one? Subtraction? To adjust the time difference, the beginning of the age cycle is quite fixed, and leap months can be determined by mathematical calculation, so there is no need? Investigate ephemeris and establish five elements? At this point, Yin-Yang and Five Elements basically withdrew from the calendar. Since then, the calendars promulgated by China in past dynasties have been similar to the taichu calendar law. After the founding of the Republic of China, the Gregorian calendar or the calendar year of the Republic of China was adopted.