Tu Van Va Xay Dung Dai Viet Joint Stock Company Address: No 12, Tran Nhat Duat Street, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900378666 Phone: 02053775618 Representative: Pham Van Thanh Adress: Hamlet 5, Vu Ninh Commune, Kien Xuong District, Thai Binh Province Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 8 - 9 - 2009