Jizi, Qizi, or Kizi was a semi-legendary Chinese sage who is said to have ruled Gija Joseon in the 11th century BCE. Early Chinese documents like the Book of Documents and the Bamboo Annals described him as a virtuous relative of the last king of the Shang dynasty who was punished for remonstrating with the king. After Shang was overthrown by Zhou in the 1040s BCE, he allegedly gave political advice to King Wu, the first Zhou king. Chinese texts from the Han dynasty onwards claimed that King Wu enfeoffed Jizi as ruler of Chaoxian. According to the Book of Han, Jizi brought agriculture, sericulture, and many other facets of Chinese civilization to Joseon. His family name was Zi/Ja (子) and given name was Xuyu/Suyu.