Khai Thac Da Dong Phong Joint Stock Company Address: Ba Nang Hamlet, Cai Kinh Commune, Huu Lung District, Lang Son Province Enterprise code: 4900246123 Phone: 02053290087 Representative: Hoang Thi Nhung Adress: No 59a, Chu Van An Street, Dong Kinh Ward, Lang Son City, Lang Son Province Cai Kinh Commune, Huu Lung District, Lang Son ProvinceFounding date: 6 - 7 - 2006