A trio of metro trains for Hohhot Metro Line 2 stand ready to go in Hohhot, in North China’s Inner Mongolia autonomous region, on May 20. The new metro line began trial operations that day. The line has a total length of 27.3 kilometers, all of which is underground track, with a total of 24 stations set up along the route. [Photo/Xinhua]

Staff members conduct training exercises for Hohhot Metro Line 2, on May 20. [Photo/Xinhua]

Horsehead-shaped handrails have been installed in the subway cars of Hohhot Metro Line 2, in a tribute to the local culture. [Photo/Xinhua]