After the protracted wars for hegemony during the Spring and Autumn Period, the number of vassal states within the Zhou Dynasty was greatly reduced. The Zhou royal family was nominally the common ruler of the world, but in fact it was virtually destroyed. The vassal states attacked each other and wars continued.After the three kingdoms were divided into the Jin Dynasty, Zhao, Wei, and Han were among the powerful states, and the Tian family replaced Qi. The pattern of the Seven Heroes of the Warring States Period was formally formed. The seven kingdoms are: Qi, Chu, Yan, Han, Zhao, and Wei.country, Qin country.