Nha Khach Ubnd Huyen Bac Son Address: Tieu Khu Hoang Van Thu, Bac Son Town, Bac Son District, Lang Son Province Enterprise code: 4900247310 Phone: 0205838750 Representative: Pham Ba Hanh Adress: TK Hong Phong, Bac Son Town, Bac Son District, Lang Son Province Bac Son Town, Bac Son District, Lang Son ProvinceFounding date: 2 - 8 - 2006