Long Tan Lang Son LTD Address: Po Cooc Hamlet, Tu Doan Commune, Loc Binh District, Lang Son Province Enterprise code: 4900771348 Phone: 02053841868 Representative: Le Thi Dung Adress: Dong Hamlet, Tam Giang Commune, Yen Phong District, Bac Ninh Province Tu Doan Commune, Loc Binh District, Lang Son ProvinceFounding date: 10 - 3 - 2014