Dau Tu Phat Trien Khai Thac Go Lang Son Joint Stock Company Address: Ca Ngoai Hamlet, Minh Son Commune, Huu Lung District, Lang Son Province Enterprise code: 4900630026 Phone: 0972640138 Representative: Trieu Duc Van Adress: Ca Ngoai Hamlet, Minh Son Commune, Huu Lung District, Lang Son Province Minh Son Commune, Huu Lung District, Lang Son ProvinceFounding date: 4 - 1 - 2011