Over 920 medical bamboo slips, together with other historical relics of the Western Han Dynasty (202 BC- 9 AD), were found in a subway construction site in Chengdu, capital city of southwest China's Sichuan Province. A total of 184 bamboo slips are said to be the "guidebook" for horse vets. The remaining 736 can be categorized into nine separate medical texts covering various domains. According to Xie Tao, a research fellow with Chengdu's archaeology institute, the books could be lost medical classics written by the successors of Bian Que, a medical pioneer from the 5th century B.C. [Photo/ Chengdu Institute of Archaeology]