Duong Hai Anh Address: Mai Tung Hamlet, Mai Sao Commune, Chi Lang District, Lang Son Province Enterprise code: 4900239422 Phone: 02053820484 Representative: Doan Minh Phuong Adress: Lang Nac Hamlet, Mai Sao Commune, Chi Lang District, Lang Son Province Mai Sao Commune, Chi Lang District, Lang Son ProvinceFounding date: 7 - 3 - 2006