A seven-year build-up, located in the large-scale Gulf submarine tunnel and the light road extension project, which will be officially launched today (1 May). The main line of the project, which is 12.1 kilometres long, consists of one each of the seabed tunnels, a mountain range tunnel, one with water and four with land. Of these, 5.1 kilometres are undersea tunnels, the North is a large shuttle Bay area, and the South is the first large trans-seabed tunnel in our northern region. This engin...