Port Toll Station (G25 18 Shencen Expressway entrance) is located in zhongshan port Toll Station (north of Shenglong West Road). There are also Zhongshan Toll Station (G0425 Guang 'ao Expressway Exit) and Zhongshan East Ring Expressway Exit. The outer ring expressway in Central Shandong Province, referred to as "Zhongshan East Ring Expressway" for short, is a part of the expressway network in Guangdong Province and a key project in provinces and cities, with a total length of about 52 kilometers.