Phong Thong Ke Huyen Ham Yen (Don Vi Nop Ho) Address: Tan Yen Town, Ham Yen District, Tuyen Quang Province Enterprise code: 5000306195 Phone: 02073843294 Tan Yen Town, Ham Yen District, Tuyen Quang ProvinceFounding date: 7 - 1 - 2009