Dau Tu Khai Thac Che Bien Khoang San Ge Viet Nam Joint Stock Company Address: P105 B6, Nghia Tan Town, Nghia Tan Ward, Cau Giay District, Ha Noi City Enterprise code: 0102719957 Phone: 0248363584 Representative: Nguyen Hong Anh Adress: 7 2 Cum 10 Civil Group, Cong Vi Ward, Ba Dinh District, Ha Noi City Nghia Tan Ward, Cau Giay District, Ha Noi CityFounding date: 17 - 4 - 2008