Lights on the almost-completed Hong Kong-Zhuhai-Macao Bridge (HZMB) have been switched on since Wednesday as the illumination system is undergoing testing. /VCG Photo

The HZMB will host a lighting ceremony and fireworks show on New Year’s Eve. /VCG Photo

The HZMB project, the world's longest manmade sea crossing, consists of a 22.9-kilometer-long bridge, a 6.7-kilometer-long underground tunnel and two artificial islands made up of concrete and steel pipes. /VCG Photo

Once operational, the Y-shaped bridge will cut down the travel time between Hong Kong and Zhuhai from three hours to just 30 minutes, establishing a convenient and efficient transportation network. /VCG Photo