Quoc Tuan Address: Khu Kon To Ong, Na Duong Town, Loc Binh District, Lang Son Province Enterprise code: 4900142847 Phone: 02145844235 Representative: Nong Van Hoa Adress: Khu Khon To Ong, Na Duong Town, Loc Binh District, Lang Son Province Na Duong Town, Loc Binh District, Lang Son ProvinceFounding date: 23 - 2 - 1999