The Hong Kong–Zhuhai–Macau Bridge connects China from its past to its future 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. The mega bridge is being jointly constructed by three cities.

The Hong Kong-Zhuhai-Macao Bridge, connecting Hong Kong, Zhuhai and Macau, is 55 kilometers long. It is the world’s longest trans-oceanic bridge. | China Plus Culture