Nanyang, Henan
As of 876, Shang Rang was a major agrarian rebel commander, as it is known that that year, Yang Fuguang the eunuch monitor of the army Emperor Xizong sent against Wang Xianzhi, reported that Shang Rang had occupied Mount Chaya (查牙山, in modern Zhumadian, Henan), forcing the imperial forces sent against him to withdraw to Deng Prefecture (鄧州, in modern Nanyang, Henan).