Truong THCS Dong Yen Address: Dong Yen, Dong Son District, Thanh Hoa Province Enterprise code: 2800787206 Phone: 0237694400 Representative: Tran Duc Adress: Dong Tan, Dong Son District, Thanh Hoa Province Dong Yen Commune, Dong Son District, Thanh Hoa ProvinceFounding date: 5 - 2 - 2004