Xay Dung Trung Son Phu Yen Address: Tieu Khu 1, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500548805 Phone: 02123861139 Representative: Phan Cong Duy Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 14 - 3 - 2017