The 16.6-km Yanfang Line, which is being debugged, will improve convenience of transportation for residents living in the city's southwestern suburb of Fangshan, state-run Xinhua news agency quoted the official as saying.
The facility is the first fully domestically developed automated subway line on the Chinese mainland, a spokesperson with the Beijing Municipal Commission of Housing and Urban-Rural Development said.
In addition, construction is expected to be completed in 2017 on two new rail lines, the city's first modern tram line and first medium-low speed maglev line.