Cheng Rui, Chinese warlord
Cheng Rui (成汭 died June 10, 903), adoptive name Guo Yu (郭禹 used until c. 888), formally the Prince of Shanggu (上谷王), was a warlord late in the Chinese Tang dynasty who ruled Jingnan Circuit (荊南 headquartered in modern Jingzhou, Hubei) from 888 to 903, until he was defeated in battle. He was known to be a capable administrator who treated his people well.