What scientific achievements did the Tang Dynasty leave behind when people passed by, which benefited China for hundreds of years?

In the 5,000-year history of China, many people were called travelers because they accurately predicted the future. There was an influential traveler in the history of the Tang Dynasty. He is Li, and when it comes to Li, people will think more of the Great TuiBei, which he co-authored with Yuan Tiangang. However, Li not only accurately predicted the historical trend of the King of Wu in the Tang Dynasty, but also was an awesome scientist, leaving many scientific achievements that influenced future generations for many years.

Modify calendar

Actually, Li was recommended by Liu Wenjing as a counselor, but before the Xuanwumen Revolution, he didn't have a chance to display his talents. The first thing that Li achieved was to improve legislation.

Before the Tang Dynasty, Fu's Wuyin Yuanli was mainly used, but due to its own defects, Wuyin Yuanli's prediction of solar and lunar eclipses was not accurate. Later, Li, who was engaged in this research, put forward many suggestions on revising Five Soundsources Separation. Although all these suggestions were not adopted, Li's talents were recognized and his career began to take off.

Improved armillary sphere

The inventor of the armillary sphere was China's Luoxiahong in the Western Han Dynasty. Because the structure of the armillary sphere was relatively simple at first, many sciences improved it, among which Geng Shouchang, Zhang Heng, Kong Ting and others made great contributions to the improvement of the armillary sphere. Although the armillary sphere is constantly being improved, with people's understanding of the world, Li has also actively improved its function.

Li added three kinds of instruments (including equatorial ring, ecliptic ring and white ring) to the original armillary sphere, which enabled the armillary sphere to directly observe the movements of the stars and the moon and provided more accurate data for the revision of the calendar. These functions have been used until the late Qing Dynasty, and even now they have certain reference value.

In addition to these achievements mentioned above, Li has many other achievements, especially in astronomy, calendar, climate, astrology, mathematics and so on. It can be said that Li is an all-rounder