Qin Shi Huang (260–210 BC), personal name Ying Zheng, was the King of the state of Qin (r. 246–221 BC) who conquered all other Warring States and united China in 221 BC. Rather than maintain the title of king borne by the Shang and Zhou rulers, he ruled as the First Emperor of the Qin dynasty from 220 to 210 BC.