Constructed in 1954, the Qinghai-Xinjiang Highway, also known as the China National Highway 315 (G315) runs west from Xining, Qinghai towards Kashgar, Xinjiang.

In 1994 the departments of communication and transportation in Qinghai and Xinjiang began the process of updating the highway.

[1][2] In the west it follows the desert Qaidam Basin south of the traditional Silk Road, crosses the Altyn-Tagh into Xinjiang, and then follows the south side of the Tarim Basin to Kashgar.

China National Highway 112 runs around Beijing Before 2013, Mainland China observed National Highway 228 as Taiwan Ring, composed of several National Expressway (Republic of China) and Taiwan provincial highways, this designation is not recognized by Republic of China (Taiwan).

Another extension plan was announced in 2022, including new small purpose connection highways (601-701).