Dau Tu Va Van Tai O To So 3 Joint Stock Company Address: No 54a, Lane 83, Ngoc Hoi Street, Hoang Liet Ward, Hoang Mai District, Ha Noi City Enterprise code: 0101086691 Phone: 02422158163 Representative: Phi Viet Phuong Hoang Liet Ward, Hoang Mai District, Ha Noi CityFounding date: 8 - 1 - 2001