Viet Thang Joint Stock Company Address: No 197, Tieu Khu 1, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500304615 Phone: 0212860884 Representative: Tran Ngoc Chung Adress: No 197, TK 1, Bac Yen Town, Bac Yen District, Son La Province Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 13 - 3 - 2008