Khai Thac Khoang San Viet Nhat Joint Stock Company Address: Civil Group 6, Yen The Town, Luc Yen District, Yen Bai Province Enterprise code: 5200440141 Phone: 0989035079 Representative: Ly Phuong Linh Adress: Khanh Thien Commune, Luc Yen District, Yen Bai Province Yen The Town, Luc Yen District, Yen Bai ProvinceFounding date: 6 - 7 - 2009