Qín Zhīwàn 秦之萬 (alias Qín Yòuān 秦又安) of Shànghǎi — Republican-era physician of the Qín family medical circle. Prefacer of the 1930 print of Tāichǎn zhèngzhì (KR3ei064), in collaboration with the Qín family editorial work supervised by his relative 秦伯未 Qín Bówèi. Not in CBDB.