After further political consolidation, seven prominent states remained by the end of the 5th century BC, and the years in which these few states battled each other is known as the Warring States period. Though there remained a nominal Zhou king until 256 BC, he was largely a figurehead and held little power. As neighboring territories of these warring states, including areas of modern Sichuan and Liaoning, were annexed, they were governed under the new local administrative system of commandery and prefecture. This system had been in use since the Spring and Autumn period and parts can still be seen in the modern system of Sheng and Xian (province and county). The final expansion in this period began during the reign of Ying Zheng, the king of Qin. His unification of the other six powers, and further annexations in the modern regions of Zhejiang, Fujian, Guangdong and Guangxi in 214 BC enabled him to proclaim himself the First Emperor (Qin Shi Huangdi).