Another milestone is about to be reached in the world's longest sea construction project, the Hong Kong-Zhuhai-Macao Bridge (HZMB). The final segment of its undersea tunnel is finally being installed.
This process is the most difficult part of building the main bridge body. Some describe it as "threading a needle under the sea." It is operated by "Zhenhua 30," the world's largest crane ship, manufactured by China.
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