Marquis Wu of Cai (è¡æ¦侯; died 837 BC), birth name unknown, was the sixth ruler of the State of Cai from 863 BC to 837 BC during the Gonghe Regency. He was the only known son of Marquis Lì of Cai (è¡å²侯), his predecessor. His reign lasted for 28 years. He was succeeded by his son.