Unexpectedly, Zhang Qian was captured by the Huns just as he left the Han territory, and was held prisoner for a dozen years. During this period, he learned the Hun language, and got to know well the geography of their territory. Ten years later, Zhang Qian escaped and found the west-moved大月氏Dàyuèshì. He lived there for a year and got familiar with the circumstances สภาวะแวดล้อม of the Western Regions. Later, when he leaned Dayuezhi had no intention to seek revenge แก้แค้น, Zhang Qian made his way back to Chang'an, with only one companion เพื่อนร่วมทาง left of the 100 who had set out.