Tu Van Khao Sat Va Do Dac Ban Do Ha Long Joint Stock Company Address: No 48 3 Khu 3 Civil Group, Tran Hung Dao Ward, Ha Long City, Quang Ninh Province Enterprise code: 5702096580 Phone: 0984565223 Representative: Doan Khanh Minh Tran Hung Dao Ward, Ha Long City, Quang Ninh ProvinceFounding date: 17 - 9 - 2021