Yen Thanh Address: No 08, Civil Group 5, To Hieu Ward, Son La City, Son La Province Enterprise code: 5500260171 Phone: 0212853030 Representative: Pham Thi Lien Adress: No 08, Civil Group 5, To Hieu Ward, Son La City, Son La Province To Hieu Ward, Son La City, Son La ProvinceFounding date: 11 - 1 - 2006