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China National Highway 103 (G103) is the main traffic corridor between Beijing and Tianjin. It goes from Tongzhou Beijing to Tianjin and then to the coastal area of Binhai New District on the outskirts of Tianjin, and runs to approximately 163 km.
This is the shortest China National Highway within those that start from 1.
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.