Phat Trien Cong Nghe Havina Joint Stock Company Address: No 44, Lane 61, Yen Hoa Street, Yen Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0103409732 Phone: 02437822025 Representative: Mai Xuan Hai Adress: Hamlet 5, Nga Tan Commune, Nga Son District, Thanh Hoa Province Yen Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 27 - 2 - 2009