Umaster LTD Address: 9th Floor, 169 Nguyen Ngoc Vu Building, Trung Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0108059337 Phone: 01632830120; 0332830120 Representative: Hoang Thai Le Trung Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 14 - 11 - 2017