A no-load test run held on an extended section of Line 7 of the Beijing Subway on Nov.27, 2019. In addition, a test run on another extension on the Batong Line went smoothly, and both will be put into use by the end of the year. The two rapid transit lines will be key public transportation to Beijing's subsidiary administrative center. Sitting in Tongzhou District in the east of the capital, the sub-center aims to accommodate 1.3 million permanent residents by 2035. (Photo: China News Service/Fu Tian)