Duyen Ha Address: Thon: Dong Hoa, Binh Thuan Commune, Van Chan District, Yen Bai Province Enterprise code: 5200258943 Phone: 0216891804 Representative: Vu Nham Tuoi Adress: Dong Hoa Xa: Binh Thuan Hamlet, Van Chan District, Yen Bai Province Binh Thuan Commune, Van Chan District, Yen Bai ProvinceFounding date: 22 - 5 - 2006