Police cars and other vehicles, which will serve during the upcoming G20 summit, are seen at a parking area in Hangzhou, Zhejiang province, China July 18, 2016. REUTERS/Stringer

Police cars and other vehicles, which will serve during the upcoming G20 summit, are seen at a parking area in Hangzhou, Zhejiang province, China July 18, 2016. REUTERS/Stringer

Police cars and other vehicles, which will serve during the upcoming G20 summit, are seen at a parking area in Hangzhou, Zhejiang province, China July 18, 2016. REUTERS/Stringer

July 20, 2016 7:51 AM (UTC+8)