Toan Thang Joint Stock Company Address: Phieng Ban 3, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500296001 Phone: 02123860248 Representative: Dang Hong Quan Adress: Civil Group 3, Quyet Thang Ward, Son La City, Son La Province Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 14 - 11 - 2007