The bridge is part of the new G50 Huyu Expressway that parallels China National Highway 318 , an east-west route between Shanghai and Chongqing ,  crossing the wide belt of mountains that separate the Sichuan Basin from the lowlands of eastern Hubei. The Yangtze River pierces the same mountain belt 50 km (31 mi) to the north, forming the famous Three Gorges . The Yiwan Railway , completed in 2010 and running parallel to the highway, has been described as China's most difficult to build and most expensive (per km) rail line. 
a Direct-controlled Municipalities . b Sub-provincial cities as provincial capitals . c Separate state-planning cities . 1 Special Economic Zone Cities . 2 Coastal development cities .
3 Prefecture capital status established by Heilongjiang Province and not recognized by Ministry of Civil Affairs. Disputed by Oroqen Autonomous Banner , Hulunbuir, Inner Mongolia as part of it.
4 Only administers islands and waters in South China Sea and have no urban core comparable to typical cities in China.
5 The claimed province of Taiwan no longer have any internal division announced by Ministry of Civil Affairs of PRC, due to lack of actual jurisdiction. See Template:Administrative divisions of the Republic of China instead.