Cong Nghe Ky Thuat Hoang Gia (Ntnn) Joint Stock Company Address: 44 Lam Son, Ward 2, Tan Binh District, Ho Chi Minh City Enterprise code: 0313426420 Phone: 0915617627 Ward 2, Tan Binh District, Ho Chi Minh CityFounding date: 3 - 9 - 2015