Ni (state)

[1] Cao Xia (descendant of Yan An [zh]) was given the small regional state of Zou.

[2] Gongzi You was enthroned at Ni state or Xiao Zhu when Yifu Yan was still alive.

At that time Qi, promoted hegemony, Yifu Yan responded positively and ran to and fro Teng, Xue and other countries, causing dissatisfaction in Lu.

Some said that, Cao Yan was executed because he helped the Boyu to usurp the throne during the reign of Duke Yi of Lu.

Shushu was on the throne for more than 10 years, Yifu Yan injustice was then rehabilitated and he was given the title Viscount Wu of Zou.

After the unjust case was clear, Shushu returned the king position to the eldest son and went to establish the state of Lan.