Constructed in 1954, the Qinghai-Xinjiang Highway, also known as the China National Highway 315 (G315) runs west from Xining, Qinghai towards Kashi, Xinjiang. It is 3,063 kilometres (1,903 mi) in length. In 1994 the departments of communication and transportation in Qinghai and Xinjiang began the process of updating the highway.
^United States; Foreign Broadcast Information Service (8 April 1994). "The Daily Report: China" (Microfinche)|format= requires |url= (help) (068). National Technical Information Service. Foreign Broadcast Information Service. pp. 49–50. Built in 1954, the 2,728-kilometer highway starts from Xining City, capital of the Qinghai Province, and runs to Shache [as received] in the Xinjiang Uygur Autonomous Region.|accessdate= requires |url= (help)
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). This observation was eventually dropped in new National Highway plans, replaced by Dandong-Dongxing Highway.
A extension plan of the highway system was announced in 2013, including extension of existing highways(101-112, 201-227, 301-330) and new highways(North-South 228-248, East-West 331-361, Connections 501-581). Only small portions of them needs to be constructed from scratch; most of the new highways would be upgraded provincial/county highways.