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Cao Bang is a mountainous province, the border is located in the Northeast region, the North and Northeast borders Guangxi (China), the border is over 333 km long, the West borders Ha Giang and Tuyen Quang provinces, the South borders 2 provinces of Bac Kan and Lang Son. North – South direction 80 km (from Duc Hanh commune, Bao Lam district to Quang Trong commune, Thach An district). East – West direction 170 km (from Ly Quoc commune, Ha Lang district to Thach Lam commune, Bao Lam district).

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