Van Phong Dai Dien – Cong Ty TNHH MTV Qtech Address: No 55, 236 Le Trong Tan Lane, Phuong Liet Ward, Ha Noi Town, Viet Nam, Ha Noi City Enterprise code: 0109662467-001 Phone: 0961083131 Representative: Tran Thi Khanh Huyen Ha Noi CityFounding date: 28 - 8 - 2025