Xu Guangqi or Hsü Kuang-ch'i, also known by his baptismal name Paul, was a Chinese agronomist, astronomer, mathematician, politician, and writer during the Ming dynasty. Xu was appointed by the Chinese Emperor in 1629 to be the leader of the Shixian calendar reform, which he embarked on with the assistance of Jesuits. Xu was a colleague and collaborator of the Italian Jesuits Matteo Ricci and Sabatino de Ursis and assisted their translation of several classic Western texts into Chinese, including part of Euclid's Elements. He was also the author of the Nong Zheng Quan Shu, a treatise on agriculture. He was one of the "Three Pillars of Chinese Catholicism"; the Roman Catholic Church considers him a Servant of God. On April 15, 2011, Vatican spokesman Federico Lombardi announced the beatification of Xu Guangqi.

João Rodrigues, distinguished as Tçuzu and also known by other names in China and Korea, was a Portuguese sailor, warrior, and Jesuit interpreter, missionary, priest, and scholar in Japan and China. He is now best known for his linguistic works on the Japanese language, including The Art of the Japanese Language. He was also long erroneously supposed to have been the main compiler of the first Japanese–Portuguese dictionary, published in 1603.