Kinh Doanh Dau Tu Ket Cau Cang Bien Viet Nam LTD Address: No 694, Ba Trieu Street, Dong Kinh Ward, Tinh Lang Son, Viet Nam Enterprise code: 4900933422 Phone: (0239) 6406351 Representative: Nguyen Hong Quang Lang Son ProvinceFounding date: 30 - 9 - 2025