By CGTN's He Weiwei
The Hong Kong-Zhuhai-Macao Bridge, or HZMB for short, is the world's longest ongoing sea-based construction project.
It's called a bridge but actually it's much, much more. The project is complex, consisting of many different parts, including 22.9 kilometers of bridge, 6.7 kilometers of tunnel, and two artificial islands connecting the bridge and the tunnel.