Phuong Duy Tay Bac LTD Address: Phieng Ban 1, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500569280 Phone: 0961073991 Representative: Nguyen Thi Huong Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 13 - 7 - 2018