Hoi Dong Y Huyen Bac Son Address: Tieu Khu Hoang Van Thu, Bac Son Town, Bac Son District, Lang Son Province Enterprise code: 4900363878 Phone: 02053837483 Adress: Bac Son District, Lang Son Province Bac Son Town, Bac Son District, Lang Son ProvinceFounding date: 7 - 8 - 2009