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Lang Son is a frontier mountainous province in the North-East of Vietnam. The province has potentiality of mineral, forestry, tourism and trading. Star aniseed (Hoa Hoi) is a specialty. The province is proud of many culture and historical vestiges. They are Rampart of Mac Dynasty, Doan Citadel Vestige, Chi Lang Defile, Ky Cung and Bac Le temples.