張騫
The name Daxia was used in the "Shiji" ("Records of the Grand Historian") by Sima Qian. Based on the reports of Zhang Qian, the "Shiji" describe Daxia as an important urban civilization of about one million people, living in walled cities under small city kings or magistrates. Daxia was an affluent country with rich markets, trading in an incredible variety of objects, coming from as far as Southern China. By the time Zhang Qian visited, there was no longer a major king, and the Bactrians were under the suzerainty of the Yuezhi. Zhang Qian depicted a rather sophisticated but demoralised people who were afraid of war. Following these reports, the Chinese emperor Wu Di was informed of the level of sophistication of the urban civilizations of Ferghana, Bactria and Parthia, and became interested in developing commercial relationship with them: These contacts immediately led to the dispatch of multiple embassies from the Chinese, which helped to develop trade along the Silk Roads.