Optimal Design Joint Stock Company Address: No 13, Alley 161, Lane 169, Hoang Mai Street, Hoang Van Thu Ward, Hoang Mai District, Ha Noi City Enterprise code: 0108056752 Phone: 0904686943 Representative: Hoang Thi Mai Hoang Van Thu Ward, Hoang Mai District, Ha Noi CityFounding date: 13 - 11 - 2017