Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
Technicians work to maintain trains on Beijing Metro Line 4 at a workshop in Beijing, Nov. 5, 2019. The workshop is able to handle the maintenance of 86 trains for Line 4 and the rapid transit line that connects the city’s southern Daxing District. (Photo: China News Service/Hou Yu)
