Individual itineraries and the circulation of scientific and technical knowledge in East Asia (16th–20th centuries)

Birth 1st April 1419. Hanlin compiler and later high minister, but not a very good astronomer.

Position of Libu shangshu 禮部尚書 (Minister of Rites), became minister in 1481 and served over a decade. Assessed Yu Zhengji's 俞正己 astronomical work, Gai li yi 改曆議, criticized him for using only Huang ji jing shi shu 皇極經世書, and was responsible for Yu's impr

Work that Zhou Hongmo 周洪謨 criticized Yu Zhengji 俞正己 for using to the exclusion of others.

Yu Zhengji 俞正己 was thrown in prison on account of his compilation of Gai li yi 改曆議 . DMB suggests that Zhou Hongmo 周洪謨 was instrumental in this action. It also suggests that his was a minor offense, just because he "recommended calendar reforms".

Death in 1491. Hanlin compiler and later high minister, but not a very good astronomer.