Dau Tu Khai Thac Khoang San Ha Long Xanh Joint Stock Company Address: No 29, Lane 369, Duong, Thong Nhat District, Dong Nai Province Enterprise code: 4601669441 Phone: 0868108888 Representative: Nguyen Duc Nghia Gia Sang Ward, Thai Nguyen City, Thai Nguyen ProvinceFounding date: 15 - 6 - 2026