Khai Khoang Phu An Joint Stock Company Address: 4 Mo Nghieu Hamlet, Tan Thanh Commune, Ham Yen District, Tuyen Quang Province Enterprise code: 5000270171 Phone: 0982572508 Representative: Nguyen Van Hieu (Nguyen Ngoc H Tan Thanh Commune, Ham Yen District, Tuyen Quang ProvinceFounding date: 9 - 1 - 2007