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File photo taken on Feb. 25, 2018 shows Chen Jining (2nd L), mayor of Beijing, China, waves Olympic flag during the closing ceremony for the 2018 PyeongChang Winter Olympic Games at PyeongChang Olympic Stadium, PyeongChang, South Korea. The Olympic Winter Games have now officially entered "Beijing time," with preparation work accelerating at an astounding pace. (Xinhua/Bai Xuefei)
