China National Highway 112 is a 1228 km ring road which runs outside Beijing (municipality).
Chicheng (Chinese: 赤城; pinyin: Chìchéng), or Ch’ih-ch’eng, is a county under the administration of Zhangjiakou City, northwestern Hebei province, bordering Beijing to the southeast. The total area of the county is 5,287 square kilometres (2,041 sq mi). The easternmost county-level division of Zhangjiakou, it administrates 9 towns and 9 townships, and as of 2010, has a population of 238,169. China National Highway 112 passes through the county just south of the county seat, Chicheng Town (赤城镇).
It was the setting of Zhang Yimou's 1999 film Not One Less.
The China National Highways of Beijing article focuses on Beijing as a national transport hub and the starting point for eleven of the twelve series-100 China National Highways. These are major truck routes, some of which are toll roads, primarily intended to connect Beijing with the rest of China.
China National Highway 112, despite being a series-100 China National Highway, does not begin in Beijing but instead starts in Gaobeidian and forms a long ring route.