Tang Zhengcai (Chinese: 唐正才, 1816–1863, born in Qiyang County, Hunan) was an eminent navy leader of the Taiping Rebellion, known during his tenure as the King of Hang (航王). He led the Taiping fleet in many battles, nearly destroying the Xiang Army. He trained other naval officers, including Li Rongfa and Li Xiucheng. Tang was killed in action in 1863. Tang Zhengcai employed wooden bridges similar in design to the Bailey bridge later developed by Donald Bailey.