What dynasty During the Era of Contending States the ruling dynasty?

During the Era of Contending States, which lasted from approximately 475 to 221 BCE, there was no single ruling dynasty. Instead, China was divided into several competing states, with the major ones being Qi, Chu, Yan, Han, Zhao, and Wei. This period is characterized by intense warfare and political intrigue as these states vied for dominance until the eventual unification under the Qin Dynasty in 221 BCE.