Phat Trien He Thong Techsys Viet Nam Joint Stock Company Address: No 1, Lane 70, Thai Ha, Trung Liet Ward, Dong Da District, Ha Noi City Enterprise code: 0108140852 Phone: 02438638555 Representative: Pham Ba Giang Trung Liet Ward, Dong Da District, Ha Noi CityFounding date: 22 - 1 - 2018