Fireworks explode over the Maracana Stadium during the closing ceremony of the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Liu Bin)

Artists perform during the closing ceremony of the 2016 Rio Olympic Games at the Maracana Stadiumin Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Wang Peng)

Artists perform during the closing ceremony of the 2016 Rio Olympic Games at the Maracana Stadiumin Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Yue Yuewei)

Artists perform during the closing ceremony of the 2016 Rio Olympic Games at the Maracana Stadiumin Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Wang Peng)

Artists perform during the closing ceremony of the 2016 Rio Olympic Games at the Maracana Stadiumin Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Wang Peng)(dh)

Photo taken on Aug. 21, 2016 shows the fireworks displayed at the Closing Ceremony of the Rio 2016 Olympic Games at Maracana Stadium in Rio de Janeiro, Brazil. (Xinhua/Han Yuqing)

Fireworks explode over the Maracana Stadium during the closing ceremony of the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Yin Bogu)

Photo taken on Aug. 21, 2016 shows the performance of the Closing Ceremony of the Rio 2016 Olympic Games at Maracana Stadium in Rio de Janeiro, Brazil. (Xinhua/Yue Yuewei) 

Artists perform during the closing ceremony of the 2016 Rio Olympic Games at the Maracana Stadiumin Rio de Janeiro, Brazil, Aug. 21, 2016. (Xinhua/Zheng Huansong)