Huyen Thang LTD Address: Khu 5, Na Sam Town, Van Lang District, Lang Son Province Enterprise code: 4900219176 Phone: 02053880519 Representative: Ma Van Huyen Adress: No 15 Khu 3, Na Sam Town, Van Lang District, Lang Son Province Na Sam Town, Van Lang District, Lang Son ProvinceFounding date: 3 - 9 - 2002