 Complete the following phrase:  The reigns of the next four kings King Gong of Zhou, King Yi of Zhou Ji Jian, King Xiao of Zhou, and King Yi of Zhou Ji Xie are poorly documented. The ninth king is said to have boiled the Duke of Qi in a cauldron, implying that the vassals were no longer obedient. The tenth king, King Li of Zhou 877841 BC was forced into exile and power was held for fourteen years by the Gonghe Regency. Lis overthrow may have been accompanied by Chinas first recorded peasant rebellion. When Li died in exile, Gonghe retired and power passed to Lis son King Xuan of Zhou 827782 BC. King Xuan worked to restore royal authority, though regional lords became less obedient later in his reign. The twelfth and last king of the Western Zhou period was King You of Zhou 781771 BC. When You replaced his wife with a concubine, the former queens powerful father, the Marquess of Shen, joined forces with Quanrong barbarians to sack the western capital of Haojing and kill King You in 771 BC. His killing resulted to beginning wars between local states which continued until 