// Workers AI · dad joke modeWhat did Shu Du say to Cai? "Cai me maybe?

Shu Du of Cai
Illustration of Duke Qin imprisoning the Ruler of Cai; from the Imperial Illustrated Edition of the Book of Documents.
Duke of the State of Cai
Reign	1046–1041 BC
Predecessor	None
Successor	Zhong Hu of Cai
Names Family name: Ji (姬) Given name: Du (度)
House	Ji
Father	King Wen of Zhou
Mother	Tai Si
Military career
Allegiance	Yin
Conflicts	Rebellion of the Three Guards (POW)

Shu Du of Cai (Chinese: 蔡叔度; lit. 'Du', '[Royal] Uncle of Cai'), given name Du (度), was the first ruler of the State of Cai.

Early life

Shu Du was the fifth son of King Wen of Zhou and his wife Tai Si (太姒). He had ten brothers and eight half-brothers. His elder brothers were Bo Yikao, Ji Fa, Shu Xian, and Ji Dan.

Reign

Shu Du was given the fief of Cai by King Wu after the overthrow of the last Shang king, Di Xin. Du's realm centred on present-day Shangcai, Henan, and the fief was aimed at controlling the heir to the Shang throne, Wu Geng, by restricting his access to eastern support from the Dongyi. He and his brothers Shu Xian of Guan and Shu Chu of Huo were known as the Three Guards, but when King Wu died and the Duke of Zhou assumed the regency for the young King Cheng of Zhou, they rebelled along with Wu Geng from the perspective of the Shang being entitled to the throne if King Wu had no heir. The Duke of Zhou was able to suppress the rebellion and Du was exiled, although Cheng eventually recreated the realm of Cai as a grant to Du's son Zhong Hu.