Although Liu Yongfu and his Vietnamese and Chinese allies failed to hold Sơn Tây against the French, Tang's loyalty to Liu on that occasion was never forgotten by the Black Flag leader.
Meskipun Liu Yongfu dan sekutunya di Vietnam dan Tiongkok gagal menahan Sơn Tây melawan Prancis, kesetiaan Tang kepada Liu pada kesempatan itu tidak pernah dilupakan oleh pemimpin Bendera Hitam.