The Bitter Tea of General Yen (1932) Barbara Stanwyck, Nils Asther, Toshia Mori

An American missionary Megan Davis arrives in Shanghai during the Chinese Civil War to marry the missionary Dr. Robert the couple moves through a danger zone they are swept into the middle of a revolution and they are separated in the crowd. Megan is hit in the head and knocked out, but is saved by General Yen, then brought by train to his palace. Megan is gradually seduced by a courtly warlord holding her in Shanghai.