Khai Khoang Hoang Lien Son Joint Stock Company Address: No 72, Phuong Hoang Street, Trung Do Ward, Vinh City, Nghe An Province Enterprise code: 2901393215 Phone: 02383552793 Representative: Tran Anh Ton Adress: Hamlet 9, Viet Thanh Commune, Tran Yen District, Yen Bai Province Trung Do Ward, Vinh City, Nghe An ProvinceFounding date: 26 - 5 - 2011