Van Phong Dai Dien So 2 - Cong Ty Co Phan Ky Thuat CTH Viet Nam Address: Khai Son Town 5.18, Khai Son City, Bo De Ward, Ha Noi Town, Viet Nam, Ha Noi City Enterprise code: 0107592278-004 Phone: 02466714343 Representative: Nguyen Van Toan Bo De Ward, Long Bien District, Ha Noi CityFounding date: 30 - 6 - 2026