Lien Doan Lao Dong Huyen Phu Yen Address: Khoi 5, Phu Yen Town, Phu Yen District, Son La Province Enterprise code: 5500354278 Phone: 02123863306 Phu Yen Town, Phu Yen District, Son La ProvinceFounding date: 19 - 3 - 2009