Sia Joint Stock Company Address: 3rd Floor Nha So 7, Nguyen Kha Trac Street, Mai Dich Ward, Cau Giay District, Ha Noi City Enterprise code: 0102373106 Phone: 0247646867 Representative: Duong Quoc Khanh Adress: P216, CT5, DN3 My Dinh 2, Tu Liem District, Ha Noi City Mai Dich Ward, Cau Giay District, Ha Noi CityFounding date: 28 - 9 - 2007