The book introduces the Xiamen Xiang'an Tunnel, with regard to the carrying out of construction for the project, the innovative technologies it used, its mode of financing, safety control management, specific components of the project, and the operational experience accumulated during its construction. Its content is comprehensive and detailed, emphasizing key events and persons by integrating them into the big picture with abundant pictures. From this book, readers will fully understand the history, construction, innovation and significance of China's first undersea tunnel – the Xiang'an Tunnel, and the outlook for China's undersea tunnel construction in the future.