(190814) -- BOSTON (U.S.), Aug. 14, 2019 (Xinhua) -- MBTA's general manager Steve Poftak (Front) speaks during the launch ceremony of the new subway cars in Boston, Massachusetts, the United States, on Aug. 14, 2019. New subway cars built by a Chinese company for Boston residents started their first run in the U.S. city of Boston on Wednesday. The first 6 of 152 cars started running on the Orange Line of Boston's subway system MBTA in the morning. For Boston residents, the new cars will increase the capacity of the line by 30,000 seats daily when all of them are fully in service. (Xinhua/Liu Jie)