Thuong Mai Dien Tu Khung Long 21 LTD Address: 6th Floor, Sannam Building, 78, Duy Tan Street, Dich Vong Hau Ward, Cau Giay District, Ha Noi City Enterprise code: 0107978641 Phone: 0982554671 Representative: Hoang Tuan Anh Dich Vong Hau Ward, Cau Giay District, Ha Noi CityFounding date: 29 - 8 - 2017