Khai Ha Address: No 127, Khoi 12, Phu Yen Town, Phu Yen District, Son La Province Enterprise code: 5500363314 Phone: 02123864061 Representative: Nguyen Van Tuan Adress: No 127, Khoi 12, Phu Yen Town, Phu Yen District, Son La Province Phu Yen Town, Phu Yen District, Son La ProvinceFounding date: 23 - 4 - 2009