Phong Lao Dong - Thuong Binh Xa Hoi Address: TK Hoang Van Thu, Bac Son Town, Bac Son District, Lang Son Province Enterprise code: 4900364896 Phone: 02053838552 Adress: Bac Son District, Lang Son Province Bac Son Town, Bac Son District, Lang Son ProvinceFounding date: 12 - 8 - 2009