Construction workers high above the Pearl River Delta in south China have installed the final segment of the Hong Kong-Zhuhai-Macao Bridge, the world's longest sea bridge. CCTV reporter He Weiwei was at the bridge's construction site to bring this report.

The massive operation began at 11 pm on Tuesday, after air temperatures dropped to around 22 degrees Celsius, perfect conditions for the process.

It took the construction team over one hour to pull up the bridge's last segment and install it to the main body of the bridge. But setting the 180-ton bridge segment into place was just the start. Workers continued welding into the day.

"Once the two ends of the bridge are linked up, there'll still be lots of work to do before the bridge is finally put into use. That includes paving the surface, giving it an anti-corrosion coating and so on," said He Weiwei.

Experts say, after the welding work is done, the bridge will be strong enough to withstand the upcoming typhoon season.

Zhang Jinwen, engineering director of the Hong Kong-Zhuhai-Macao Bridge authority, said, "The typhoon season usually starts in July, that’s why we have to finish the link now- to complete the main bridge and make it stable. The bridge is designed to resist typhoons with wind speeds of 170 Kilometers per hour."

Seven years into construction, the bridge is one of the most complex projects in China. It consists of 23 kilometers of bridges, 7 kilometers of tunnels, and a number of artificial islands.

"Such a comprehensive project proves that our country’s design and construction ability meets advanced international standards, besides our domestic equipment manufacturing enables us to achieve such great accomplishments," said Wei Dongqing, executive director of the Hong Kong-Zhuhai-Macao Bridge authority.

The Hong Kong-Zhuhai-Macao Bridge is designed to last 120 years. But it has already become a major landmark in the pearl river delta region.