Mangan Viet Bac Joint Stock Company Address: Binh Vang Industrial Zone, Dao Duc Commune, Vi Xuyen District, Ha Giang Province Enterprise code: 5100365324 Phone: 0975591662 Representative: Pham Van Hoan Dao Duc Commune, Vi Xuyen District, Ha Giang ProvinceFounding date: 19 - 10 - 2011