 Complete the following phrase:  Liu Yongfu  18371917 was a Chinese warlord and commander of the celebrated Black Flag Army. Liu won fame as a Chinese patriot fighting against the French Empire in northern Vietnam Tonkin in the 1870s and early 1880s. During the Sino-French War August 1884April 1885 he established a close friendship with the Chinese statesman and general Tang Jingsong, and in 1895 he helped Tang organise resistance to the 