Hop Tac Xa Que Yen Address: Hong Ha Hamlet, Mau A Town, Van Yen District, Yen Bai Province Enterprise code: 5200278410 Phone: 0216835985 Representative: Doan Van Binh Adress: Hong Ha Hamlet, Mau A Town, Van Yen District, Yen Bai Province Mau A Town, Van Yen District, Yen Bai ProvinceFounding date: 10 - 9 - 2007