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

Birth in Zhenhai 鎮海 (Zhejiang).

Teacher of Bei Lin 貝琳. Held post of Vice Minister of the Court of the Imperial Stud (Taipu shaoqing 太業少卿).

Teacher of Bei Lin 貝琳. Held post of Gentleman-attendant (lang 郎) of the Imperial Observatory [of the Five Offices] (Wuguan lingtai 五官靈台) in the Directorate of Astronomy (Qintianjian 欽天監)

Teacher of Bei Lin 貝琳. Held post of Erudite who was Manager of the Calendar (Sili boshi 司曆博士).

Military service during the Zhengtong (1436-1449) and Jingtai (1450-1457) periods. His talents for astronomy (tianxiang 天象) and astrology (zhanhou 占候) were recognised during this time and resulted in his promotion to the Directorate of Astronomy (Qintianj

Return to Beijing to take up Position of Erudite of the Water Clock (Louke boshi 漏刻博士) in the Directorate of Astronomy (Qintianjian 欽天監). First year of the Tianshun reign period, with Yingzong on the throne.

Promotion to Gentleman-attendant (lang 郎) of the Imperial Observatory [of the Five Offices] (Wuguan lingtai 五官靈臺) in the Directorate of Astronomy (Qintianjian 欽天監). First year of the Tianshun reign period, with Yingzong on the throne.

Promotion to Director (Jianfu 監副) of the Directorate of Astronomy (Qintianjian 欽天監), date given http://www.zwbk.org.

Compilation of the astronomical work Qi zheng tui bu 七政推步. We are told that he worked on it between Chenghua 6 (1470=02=01 ～ 1471=01=20) and Chenghua 13 (1477=01=15 ～ 1478=02=02), and that it was in circulation from this time onward. Also, it had somethin

Move to Nanjing to occupy the position of Director (Jianfu 監副) of the Directorate of Astronomy (Qintianjian 欽天監) there.

Death, date given in http://www.zwbk.org.