A ship transporting an immersed tube carries out an operation on a tunnel in Shenzhen, South China's Guangdong Province on October 20, 2022. The tunnel, which is made up of 32 tubes, forms part of the Shenzhen-Zhongshan cross-sea link project. The Shenzhen-Zhongshan cross-sea link will open to traffic in 2024. Photo: cnsphoto