Cheng I (1765 – 1807) (鄭一, pinyin: Zhèng Yī, Cantonese: Jihng Yāt, also romanised as Zheng Yi) was one of the most powerful Chinese pirates along the Chinese coast during the 19th century. He and his wife Ching Shih, a prostitute whom he fell in love with, captured Cheung Po Tsai who according to legend became her lover. Cheung was later adopted by them. After Cheng I died on November 16, 1807, Ching Shih took over the pirating business.