Yi Xing

Painting of Yi Xing from the Shingon Hassozō, a series of scrolls depicting the first eight patriarchs of the Shingon school of Buddhism. Japan, Kamakura Period (13th-14th century)

Yi Xing (Chinese: 一行; pinyin: Yī Xíng; Wade–Giles: I-Hsing, 683–727), born Zhang Sui (Chinese: 張遂), was a Chinese astronomer, Buddhist monk, inventor, mathematician, mechanical engineer, and philosopher during the Tang dynasty. His astronomical celestial globe featured a liquid-driven escapement, the first in a long tradition of Chinese astronomical clockworks.


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