Cty Trach Nhiem Huu Han Phat Trien Cong Nghe Khoang Lang Son Address: Lane 5, Tran Quang Khai Street, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900142879 Phone: 0205810355 Representative: Nguyen Chi Dung Adress: Lane 5, Tran Quang Khai P.Chi Lang Street, Lang Son City, Lang Son Province Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 1 - 3 - 1999