The Lanzhou–Haikou Expressway (Chinese: 兰州—海口高速公路), commonly referred to as the Lanhai Expressway (Chinese: 兰海高速公路) is an expressway that connects the cities of Lanzhou, Gansu, China, and Haikou, Hainan. When fully complete, it will be 2,570 km (1,600 mi) in length.

China Expwy G75 sign with name.svg

Lanzhou–Haikou Expressway
Lanhai Expressway
The expressway crossing the Wujiang Viaduct over the Wu River in Guizhou
Route information
Length2,570 km[1] (1,600 mi)
Length when complete.
Major junctions
North endKokudou 212(China).svg China National Highway 212 and South Langongping Street, Lanzhou, Gansu
South endHaikou, Hainan (when complete)
China Expwy G15 sign with name.svg G15 Shenyang–Haikou Expressway, Zhanjiang, Guangdong (current)
Highway system
National Trunk Highway System



The northern terminus of G75 at Lanzhou South toll station

The expressway is complete from Lanzhou to Weiyuan County in Dingxi, and under construction until Longnan. From Lanzhou the expressway enters the New Qidaoliang tunnel (length 4,070 metres (2.53 mi)) through the Xinglongshan mountains, from where it follows the Tao River parallel to G212. Past Lintao, the route diverges from the Tao river valley and passes through hilly landscape through a couple of tunnels until exiting in the Wei River valley. From there it continues Provincial Expressway 14, and the under construction section of G75 exits. In Min County, the expressway will be parallel to G212 again until Longnan, exiting Gansu through a mountainous valley by numerous tunnels and viaducts.


The expressway is under construction from the Gansu border to Nanchong, and complete from Nanchong to the Chongqing border.


The expressway is complete in Chongqing.


The expressway is complete in Guizhou.


The expressway is under construction from the Guizhou border to Du'an Yao Autonomous County, and complete from Du'an to the Guangdong border.


The expressway is complete from the Guangxi border to Zhanjiang. At Zhanjiang, the expressway is under construction as the fixed bridge link from Guangdong to Hainan is still under construction.


When completed, the southern terminus of the expressway will be in Haikou, Hainan. Hainan is an island and currently not connected to the rest of Mainland China by a fixed road link. A bridge is being built over the Qiongzhou Strait, separating Guangdong from Hainan and will carry the Lanzhou–Haikou Expressway to Hainan.


  1. ^ [1] (in Chinese)