Giao Duc & Dao Tao Dolphin Edu Joint Stock Company Address: No 16C, Deo Giang Street, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900807668 Phone: 02053767555 Representative: Hoang Thi Yen Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 13 - 4 - 2017