Van Phong Dai Dien Bac Son - Cong Ty Co Phan Tu Van Va Dau Tu Nam Son Address: No 10, Khoi, Tran Phu Street, Bac Son Town, Bac Son District, Lang Son Province Enterprise code: 0108356234-001 Phone: 0824790996 Representative: Tran Thuy Anh Bac Son Town, Bac Son District, Lang Son ProvinceFounding date: 3 - 11 - 2021