Liu Yongfu
With support from China, Vietnamese and Chinese freebooters fought against the French in Lang Son in the 1890s. They were labelled "pirates" by the French. The Black Flags and Liu Yongfu in China received requests for assistance from Vietnamese anti-French forces. Pirate Vietnamese and Chinese were supported by China against the French in Tonkin. Women from Tonkin were sold by pirates. Dealers of opium and pirates of Vietnamese and Chinese origin in Tonkin fought against the French Foreign Legion.