While a number of publications say the bridge is 34.1 miles (55 km) long, the website for the Hong Kong-Zhuhai-Macao Bridge (HZMB) says the main project only spans a total of approximately 26 miles (42 km).
It consists of three cable-stayed bridges and one undersea tunnel, and is 14 miles longer than the most narrow width of the English Channel.
Supporters of the bridge promote it as an engineering marvel, while others see it as a costly political project created to further integrate Hong Kong into the mainland at a time when Beijing is tightening its grip on the semi-autonomous city.
It will slash the travel time between Hong Kong and Zhuhai from three hours to just 30 minutes, further integrating the cities in the Pearl River Delta. Instead, a majority of traffic will come from shuttle buses or "special hire cars".
While, some residents fear its arrival will see the city swamped by tourists from mainland China. Others say the bridge is another way for Beijing to bind the autonomous administrative regions closer to China.
"The collaboration between Guangdong, Hong Kong and Macao in terms of trade, finance, logistics and tourism will be strengthened".
A section of the Hong Kong-Zhuhai-Macau Bridge (HKZMB) is seen from Lantau island in Hong Kong, Oct. 7, 2018. The tunnel runs between two artificial islands, each measuring 100,000 square meters.
While an impressive engineering feat, the building of the bridge brought its own controversies. Officials also pledged to be careful to protect Chinese white dolphins that live in the delta.
"Xi Jinping's visit to the region also reinforces Hong Kong's role in the cross-border economy approach that China is developing", said Dr. Winnie King, a specialist in Chinese worldwide political economy at the University of Bristol.
Nine workers have died in the construction of the bridge and 200 have been injured. The bridge is not served by public transport.
The construction of the multibillion-dollar bridge had begun in December 2009.