Meng Tian
Meng Tian's ingenuity can be seen in the efficient (though inhumane) building policy, the consideration of topography, and the utilisation of natural barriers. Meng Tian supervised the construction of a road system linking the former Yan, Qi, Wu and Chu areas, as well as a number of roads especially for imperial use. The system eventually formed played an extremely important role in ancient transportation and economic exchanges. He is also traditionally, if erroneously, credited with having invented the "Ink brush" (毛筆) and is specially remembered at the "Huzhou Pen Festival", which developed from festivities at his ancestor temple. Meng Tian is also credited with inventing the "zheng" (筝), a bridge zither with twelve or thirteen strings.