Khai Thac Khoang San Hai Yen Address: Dong Hamlet, Hung Son Commune, Tinh Gia District, Thanh Hoa Province Enterprise code: 2801346250 Phone: 0987937877 Representative: Le Huu Khuong Adress: Dong Hamlet, Hung Son Commune, Tinh Gia District, Thanh Hoa Province Hung Son Commune, Tinh Gia District, Thanh Hoa ProvinceFounding date: 21 - 4 - 2009