突厥人在丝绸之路上唯一一次由西向东的挺进。继匈奴通过丝绸之路西迁后,东晋末年,中国北部地区气候持续降温,粮食减收,牧草退化,大量少数民族涌入内地,中国进入“五胡十六国”时代。 Turks only advance from west to east on the Silk Road. Following the westward movement of the Huns through the Silk Road, the climate in northern China continued to cool down at the end of the Eastern Jin Dynasty. Grain was reduced and forage was degenerated. A large number of ethnic minorities invaded the hinterland and China entered an era of “Five Hu and 16 States.”