Duong Hai - Lang Thip Address: Lien Ket Hamlet, Lang Thip Commune, Van Yen District, Yen Bai Province Enterprise code: 5200623321 Phone: 02034513894 Representative: Bui Van Duong Adress: Lien Ket Hamlet, Lang Thip Commune, Van Yen District, Yen Bai Province Lang Thip Commune, Van Yen District, Yen Bai ProvinceFounding date: 25 - 3 - 2011