DN Tu Nhan Viet Thang Address: TK 1, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500263976 Phone: 0212860109 Representative: Pham Viet Thang Adress: TK 1, Bac Yen Town, Bac Yen District, Son La Province Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 25 - 4 - 2006