The construction of the 6.8-kilometer-long underwater tunnel section of the Shenzhen-Zhongshan link in south China's Guangdong Province has been completed.
The new cross-sea highway project stretches 24 kilometers and consists of one underwater tunnel, two bridges and two artificial islands, making it one of the most challenging cross-sea cluster projects in the world. The cross-sea link is scheduled to open to traffic in 2024.
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