Tongmi line

Tongmi line of Beijing Suburban Railway (BCR), formerly known as Jingcheng line, is a commuter rail line in Beijing. It opened on 30 June 2020.

The main line runs on the existing Beijing–Chengde Railway, and the branch line runs on the existing Beijing–Tongliao Railway. It runs from to  (main line) or  (branch line). The line is 84.2 km in length.