Truong Mam Non Vien Son Address: Khe Dua Hamlet, Vien Son Commune, Van Yen District, Yen Bai Province Enterprise code: 5200892194 Phone: 0385178873 Representative: Nguyen Thi Hoi Thuan Adress: Khe Dua Hamlet, Vien Son Commune, Van Yen District, Yen Bai Province Vien Son Commune, Van Yen District, Yen Bai ProvinceFounding date: 21 - 8 - 2018