Hop Tac Xa Thanh Dat Tan Thanh Address: Moc 15, Truc Chinh Street, Cua Khau Tan Thanh, Van Lang District, Lang Son Province Enterprise code: 4900150238 Phone: 0205888334 Representative: Nguyen Tai Duong Adress: 3/1, Chi Lang Ward, Lang Son City, Lang Son Province Van Lang District, Lang Son ProvinceFounding date: 28 - 8 - 1999