Tu Van Ky Thuat Dong Bac Joint Stock Company Address: No 202, Civil Group 1, Gieng Day 3B Quarter, Viet Hung Ward, Quang Ninh Town, Viet Nam Enterprise code: 5702235516 Phone: 0385516533 Representative: Tran Hai Long Quang Ninh ProvinceFounding date: 14 - 9 - 2026