Dich Vu Ky Thuat O To Cong Thanh Joint Stock Company Address: Ly Nhan Hamlet, Duc Tu Commune, Dong Anh District, Ha Noi City Enterprise code: 0110932090 Phone: 0936222172 Representative: Tran Cong Phu Duc Tu Commune, Dong Anh District, Ha Noi CityFounding date: 9 - 1 - 2025