Thuong Mai Khai Thac Da Phuong Ngoc Joint Stock Company Address: No 6, Alley 35, Lane 4, Phuong Mai Street, Phuong Mai Ward, Dong Da District, Ha Noi City Enterprise code: 0106306291 Phone: 0974629697 Representative: Nguyen Van Chinh Adress: Cam Gia Hamlet, Gia Tien Commune, Gia Vien District, Ninh Binh Province Phuong Mai Ward, Dong Da District, Ha Noi CityFounding date: 16 - 9 - 2013