 According to the "Wu-Yue Chunqiu" (history of the Wu-Yue War), written in the Eastern Han dynasty, the repeating crossbow was invented during the Warring States Period by a Mr. Qin from the State of Chu.This is corroborated by the earliest archaeological evidence of repeating crossbows, which was excavated from a Chu burial site at Tomb 47 at Qinjiazui, Hubei Province, and has been dated to the 4th century BC, during the Warring States Period (475 - 220 BC).Unlike repeating crossbows of later eras, the ancient double shot repeating crossbow uses a pistol grip and a rear pulling mechanism for arming.