Dau Tu Va Phat Trien Dich Vu Ky Thuat Thien Phu Joint Stock Company Address: Nha 6B, 6th Floor (SAN VAN PHONG), Hon Hop Song Da Building, No 131, Tran Phu Street, Phuong, Ha Dong District, Ha Noi City Enterprise code: 0111588570 Phone: 0982686693 Representative: Nguyen Dang Nha Ha Dong Ward, Ha Dong District, Ha Noi CityFounding date: 31 - 7 - 2026