In 221 BC, Ying Zheng accomplished his objective and established China's first feudal and centralized empire. The Qin Dynasty was what we called it (221 BC - 206 BC). Ying Zheng declared himself Qin Shi Huang, the first emperor of a united China. Qin Shi Huang, on the other hand, destroyed neighboring nations one by one, swallowing their territory into his expanding empire and enslaving and castrating their people. "He castrated people from other countries every time he seized them in order to mark them and turn them into slaves," explains Xun Zhou of Hong Kong University.