Wenxue Guyuan. Novel volume

Among the four passes -- "e;East Tongguan, South Wuguan, West Sanguan, North Xiaoguan"e;, in the central Shaanxi plain, North Xiaoguan is also known as Han Xiaoguan, and located at the northern side of Liupan Mountain.Because of its important military value, the previous dynasties paid great attention to the administration of Guyuan, and because it is located in the overlapping zone between the northern nomadic culture and farming culture of the Central Plains and is the place that the ancient Silk Road must pass by, Guyuan has always played an important role in politics, economy and culture in the history of China.