Petrolimex Concrete and Construction Company Limited
Km 17 Quốc lộ 39, thôn Lôi Cầu, Xã Việt Hòa, Khoai Chau District
Northern Concrete Joint Stock Company
Thôn Tổ Hỏa, Xã Lý Thường Kiệt, Yen My District
Truong Son Trading and Investment Company Limited
Thôn Xuân Lôi, Xã Đình Dù, Van Lam District