Co Khi Bach Khoa Dinh Thi LTD Address: No 3 LK28, Moi Van Phu Urban Area, Kien Hung Ward, Ha Dong District, Ha Noi City Enterprise code: 0111448502 Phone: 0346525730 Representative: Nguyen Dinh Thi Kien Hung Ward, Ha Dong District, Ha Noi CityFounding date: 7 - 4 - 2026