Khai Thac Khoang San Dai Son Joint Stock Company Address: An Son Hamlet, Huyen Son Commune, Luc Nam District, Bac Giang Province Enterprise code: 2400948515 Phone: 0975388933 Representative: Dinh Quang Vi Adress: Luong Hamlet, Tri Phuong Commune, Tien Du District, Bac Ninh Province Huyen Son Commune, Luc Nam District, Bac Giang ProvinceFounding date: 27 - 10 - 2022