Gaoligong Mountain Tunnel: Travel through the geological maze and create a railway legend! After nine years of ups and downs, the Gaoligongshan Tunnel, the pride of the Dali-Ruili Railway, has been successfully excavated!  This giant dragon with a total length of 34.538 kilometers not only broke many records for railway tunnels in my country, but also wrote an unyielding chapter in the geological challenges.  This is not only a railway, but also a legend and a symbol of the times!