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- 01Yumenguan was one of two garrison passes controlling movement out of China's northwest into the Tarim Basin desert.
- 02Wang Zhihuan's poem 'Liangzhou Ci' fixed Yumenguan as a cultural symbol of loneliness in 100 characters written around 700 AD.
- 03The fort's mudbrick ruins were excavated in the 20th century and still stand in Gansu, 90 kilometers from Dunhuang.