China National Highway 318 (G318) is a trunk road in China that runs east-west from Shanghai in East China to Zhangmu on the China-Nepal border. It is the longest of the China National Highways at 5,476 kilometres (3,403 mi) in length and runs west from Huangpu District, Shanghai towards Zhejiang, Anhui, Hubei, Chongqing, Sichuan, and ends in Tibet Autonomous Region. From Lhasa to Zhangmu it is also called Friendship Highway. From Markam to Zogang it shares the highway with G214. At the Sino-Nepal Friendship Bridge, it connects with the 115 km long Araniko Highway to Kathmandu.

National Highway 318
318国道
Route information
Part of AH42
Length	5,476 km (3,403 mi)
Major junctions
From	People's Square, Shanghai
To	Sino-Nepal Friendship Bridge, Zhangmu NH34 (Araniko Highway)
Location
Country	China
Highway system
National Trunk Highway System Primary Auxiliary
← G317 → G319

The route is popular with tourists due to the wide variety of biomes, cultural areas, and natural scenery.^[1]