Lien Doanh Co Khi O To Address: An Tri Hamlet, Binh Trung Commune, Cao Loc District, Lang Son Province Enterprise code: 4900226060 Phone: 0205717999 Representative: Bui Hong Quan Adress: No 169, Nguyen Du Street, Lang Son City, Lang Son Province Binh Trung Commune, Cao Loc District, Lang Son ProvinceFounding date: 1 - 4 - 2004