Huyen Doan Yen Son Address: An Tuong Commune, Tuyen Quang City, Tuyen Quang Province Enterprise code: 5000342901 Phone: 02073872271 Adress: Yen Son District, Tuyen Quang Province An Tuong Ward, Tuyen Quang City, Tuyen Quang ProvinceFounding date: 3 - 3 - 2009