Huyen Doan Thanh Nien Address: Khu 3, Tram Tau Town, Tram Tau District, Yen Bai Province Enterprise code: 5200378648 Phone: 02163876292 Representative: Lai Trong Nghia Tram Tau Town, Tram Tau District, Yen Bai ProvinceFounding date: 21 - 5 - 2009