Hoang Quan Joint Stock Company Address: Civil Group 6, Yen Binh Town, Yen Binh District, Yen Bai Province Enterprise code: 5200273596 Phone: 0984778138 Representative: Pham Van Hien Adress: Civil Group 6, Yen Binh Town, Yen Binh District, Yen Bai Province Yen Binh Town, Yen Binh District, Yen Bai ProvinceFounding date: 22 - 5 - 2007