Dau Tu Khai Thac Khoang San Hoang Mai LTD Address: No 068, Civil Group 14, Song Hien Ward, Cao Bang City, Cao Bang Province Enterprise code: 4800259665 Phone: 02066282268 Representative: Hoang Van Vinh Adress: No 068, Civil Group 14, Song Hien Ward, Cao Bang City, Cao Bang Province Song Hien Ward, Cao Bang City, Cao Bang ProvinceFounding date: 23 - 7 - 2009