Tu Van Dau Tu Xay Dung Va Thuong Mai Khai Son LTD Address: No 99, Hoang Hoa Tham Street, Cao Thuong Town, Tan Yen District, Bac Giang Province Enterprise code: 2400572580 Phone: 0354555011 Representative: Than Van Son Adress: Ngoc Chau Commune, Tan Yen District, Bac Giang Province Cao Thuong Town, Tan Yen District, Bac Giang ProvinceFounding date: 7 - 11 - 2011