Thuong Mai Cong Nghe Ja An Joint Stock Company Address: No 66, Thanh Nien Street, Khu Vuon Sai, Dong Dang Town, Cao Loc District, Lang Son Province Enterprise code: 4900856390 Phone: 0981373758 Representative: Mai Sy Hung Adress: No 20, Dang Dung, Quan Thanh Ward, Ba Dinh District, Ha Noi City Dong Dang Town, Cao Loc District, Lang Son ProvinceFounding date: 30 - 10 - 2019