Doi Quan Ly Thi Truong So 4 Ham Yen Address: Tan Yen Town, Ham Yen District, Tuyen Quang Province Enterprise code: 5000625018 Phone: 02073843190 Representative: Le Quoc Hung Adress: Tan Yen Town, Tan Yen Town, Ham Yen District, Tuyen Quang Province Tan Yen Town, Ham Yen District, Tuyen Quang ProvinceFounding date: 26 - 7 - 2010