Li Si
Qin Shi Huang and Li Si unified China economically by standardizing the Chinese units of measurements such as weights and measures, the currency, and the length of the axles of carts to facilitate transport on the road system. The emperor also developed an extensive network of roads and canals connecting the provinces to improve trade between them. The currencies of the different states were also standardized to the Ban liang coin (半兩, "Bàn Liǎng"). Perhaps most importantly, the Chinese script was unified. Under Li Si, the seal script of the state of Qin was standardized through removal of variant forms within the Qin script itself. This newly standardized script was then made official throughout all the conquered regions, thus doing away with all the regional scripts to form one language, one communication system for all of China.