Hieu Tien Address: Khoi 10, Phu Yen Town, Phu Yen District, Son La Province Enterprise code: 5500390678 Phone: 02123863864 Representative: Nguyen Trung Thang Adress: Khoi 10, Phu Yen Town, Phu Yen District, Son La Province Phu Yen Town, Phu Yen District, Son La ProvinceFounding date: 4 - 2 - 2010