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

Minggantu is stimulated by Jartoux, Pierre 杜德美 and wrote Ge yuan mi lü jie fa 割圓密率捷法 for thirty or so years; but the work remained unfinished when he died

Ming Xin followed his father's order to finish Ge yuan mi lü jie fa 割圓密率捷法 with his father's students

Chen Jixin was ordered to complete Gu yuan mi lü jie fa after Minggantu's death through speculation and personal teaching from Minggantu

Zhang Gong continued and finished Ge yuan mi lü jie fa with Chen Jixin. They discussed and Zhang Gong was highly praised by Chen.