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

Birth in Chang'an, before his appointment in Hongwu 17 (1384=01=23 ～ 1385=02=09)

Quoted in Chou ren zhuan, and also on the web, under Datong lifa tonggui 大統曆法通軌.

Appointment in Hongwu 17 (1384=01=23 - 1385=02=09) to Erudite of the Water Clock (Louke boshi 漏科博士) in the Directorate of Astronomy (Qintianjian 欽天監) (1384=01=23 - 1385=02=09)

Abandonment of the name "Tupan calendrical system" (Tupan lifa 土盤曆法) by Yuan Tong 元統 who subsequently called it Han suan 漢算. Mentioned in the biography of Bei Lin 貝林.

Mention of Yuan Tong 元統 in the Preface to Xiao an xin fa 曉庵新法 by Wang Xichan 王錫闡

Appearance of name under Yuan Tong in Chou ren zhuan, i.e. they are included in the same biography.