Ky Thuat Thien Son LTD Address: No 15, Alley 23, 82 Nguyen Phuc Lai Lane, O Cho Dua, Dong Da District, Ha Noi City Enterprise code: 0101329111 Phone: 0248560522 O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 28 - 1 - 2003