The Hong Kong-Zhuhai-Macao Bridge is a bridge and tunnel project connecting Hong Kong, Zhuhai, and Macau in the People's Republic of China. With a total length of 55 kilometers, it is the longest cross-sea bridge in the world. It includes a 22.9 km bridge project and a 6.7 km undersea tunnel connected by two artificial islands to the east and west. The Bridge is world-famous for its huge construction scale, unprecedented construction difficulty and state-of-the-art construction technology, which embodies the spirit of human struggle to open roads on mountains and build bridges in rivers.