Dau Tu Phat Trien Thien An Joint Stock Company Address: No 213, Civil Group 17, Thanh Nien Street, Hong Ha Ward, Yen Bai City, Yen Bai Province Enterprise code: 5200645999 Phone: 02163814119 Representative: Hoang Trong Trung Adress: No 40, Bich Cau Street, Quoc Tu Giam Ward, Dong Da District, Ha Noi City Hong Ha Ward, Yen Bai City, Yen Bai ProvinceFounding date: 8 - 6 - 2011