China National Highway 310 (G310) runs northwest from Lianyungang, Jiangsu towards Anhui, Henan, Shaanxi provinces, and ends in Tianshui, Gansu.

It was originally 1613 kilometres in length, but was later extended westward to Gonghe County in Qinghai.

[1][2] It runs parallel to the important G30 Lianyungang–Khorgas Expressway and Longhai railway east-west transport corridors.

[2] 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).