#China's largest diameter undersea shield tunnel has officially opened! On January 21, the Mawan Undersea Tunnel, #Shenzhen's first undersea #tunnel, was opened. Stretching 8.05 kilometers, the tunnel boasts a maximum excavation diameter of 15.5 meters, making it the largest undersea shield tunnel in China. It improves both passenger and freight transport, enhancing the overall connectivity of Shenzhen's #transportation network.
#China #Shenzhen #tunnel