Dau Tu & Xay Dung Bac Son LTD Address: Civil Group 14, Phuong Trung Tam, Nghia Lo Town, Yen Bai Province Enterprise code: 5200475401 Phone: 0912106934 Representative: Nguyen Vinh Bac Adress: Civil Group 23, Tan An Ward, Nghia Lo Town, Yen Bai Province Trung Tam Ward, Nghia Lo Town, Yen Bai ProvinceFounding date: 30 - 11 - 2009