HTX Khai Thac San Xuat Kinh Doanh Vat Lieu Na Hoa Address: Khu Dau Cau Na Hoa, Son Ha Commune, Huu Lung District, Lang Son Province Enterprise code: 4900153253 Phone: 0205826334 Representative: Luong Van Nhan Adress: Dau Cau Na Hoa, Son Ha Commune Son Ha Commune, Huu Lung District, Lang Son ProvinceFounding date: 10 - 1 - 2000