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References
1.Xincheng xian zhi [Gazeteer of Xincheng xian] (n.d.) Tongzhi edition . Juan 1, Fengsu .
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Yan Ruhuan
(n.d.) Sansheng pianfang lüelan (An Examination of Border Security of Three Provinces [Sichuan, Shaanxi, Hubei] . Juan 9.