Qin Shi Huang
Qin Shi Huang, also known as Qin Shi Huangdi was the first emperor to unite, or bring together, all of China. He lived from 259 BC – September 10, 210 BC. He was king of the Chinese State of Qin from 221 BC – 206 BC (that was officially under the rule of the Zhou Dynasty). He founded the short-lived Qin Dynasty, which was the first Chinese kingdom. Its official name was the State of Qin and his official title was "The First Emperor of the State of Qin".
He introduced, or brought in, legalism. He and his advisor Li Si started a lot of reforms to bring China together politically. They had huge projects, including the Great Wall of China, a city-sized mausoleum guarded by a life-sized Terracotta Army, and a system of roads that went all over the nation.