China National Highway 566 runs from Xiji in Ningxia to Tianshui in Gansu.[1] At Xiji, it connects to G309 and at Tianshui to G310. Most of the route consists of upgraded sections of Ningxia provincial highway S202 and Gansu provincial highways S305 and S218. It is one of the new trunk highways proposed in the China National Highway Network Planning (2013 - 2030).
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.
Another extension plan was announced in 2022, including new small purpose connection highways (601-701).
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