Cong Nghe So Lang Son LTD Address: No 355e, Duong Tran Dang Ninh, Tam Thanh Ward, Lang Son City, Lang Son Province Enterprise code: 4900811720 Phone: 02053836363 Representative: Nguyen Van Dung Nguyen Huy Hoang Tam Thanh Ward, Lang Son City, Lang Son ProvinceFounding date: 19 - 7 - 2017