Duy Hoang Bac Yen LTD Address: Tieu Khu Van Ban, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500561235 Phone: 0988986859 Representative: Mui Van Vien Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 19 - 12 - 2017