Khai Thac Khoang San Hoang Yen Joint Stock Company Address: De Hamlet, Nghia Hung Commune, Lang Giang District, Bac Giang Province Enterprise code: 2401006475 Phone: 0984930122 Representative: Duong Thi Yen Nghia Hung Commune, Lang Giang District, Bac Giang ProvinceFounding date: 20 - 12 - 2024