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[1][2] on the outskirts of Tianjin, and runs to approximately 162 km.[3]
^国家公路网规划 [National Highway Network Plan] (PDF) (Report) (in Chinese). National Development and Reform Commission. 4 July 2022. p. 34. Retrieved 16 November 2025.
^公路交通气象预报格式 [Format of weather forecast on highway traffic] (PDF) (Report) (in Chinese). Beijing: 上海市气象局官方 (Shanghai Meteorological Service). 30 December 2011. p. 7. Retrieved 16 November 2025.
^Hou, Guangbing (2021-06-10). "Distribution map of China National Highway". Disaster Risk Reduction Knowledge Service. International Knowledge Center for Engineering Sciences and Technology (IKCEST). Retrieved 16 November 2025.
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).