Opensea Joint Stock Company Address: 3-4 Floor, No 08, Trang Thi Street, Hang Trong Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0108160263 Phone: 01679142442; 0379142442 Representative: Nguyen Duc Hoa Hang Trong Ward, Hoan Kiem District, Ha Noi CityFounding date: 5 - 2 - 2018