MTV Vien Thong Trinh Son LTD Address: Tieu Khu 3, Bac Yen Town, Bac Yen District, Son La Province Enterprise code: 5500545829 Phone: 0869819888 Representative: Trinh Van Son Bac Yen Town, Bac Yen District, Son La ProvinceFounding date: 20 - 12 - 2016