Khai Thac Khoang San Lang Son LTD Address: No 117, Khon Cuong Street, Cao Loc Town, Cao Loc District, Lang Son Province Enterprise code: 4900833386 Phone: 01638761992; 0338761992 Representative: Toan Van Vang Adress: No 86, Civil Group 3, Khoi 4, Cao Loc Town, Cao Loc District, Lang Son Province Cao Loc Town, Cao Loc District, Lang Son ProvinceFounding date: 3 - 8 - 2018