Zhongnanshan Tunnel tunnel is the longest in China with the two pipes, wherein the one pipe length of 18.040m. Part of a network of freeways China. It was opened in 2007 and connects the two cities Xi’an – Ankang. Because of its enormous length, resourceful Chinese are enriched by green areas because they believe that the driver was a problem koncentaricije (bored) in such long tunnels. (Zhongnan Mountains)
China always come up with new innovation