Hot air balloons are seen during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Mario Armas/Xinhua)

Hot air balloons rise during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Luis Licona/Xinhua)

Hot air balloons are seen during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Mario Armas/Xinhua)

Hot air balloons rise during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Mario Armas/Xinhua)

Hot air balloons rise during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Luis Licona/Xinhua)

People prepare a hot air balloon during the 2020 International Balloon Festival in Leon City of Guanajuato State, Mexico, on Nov. 13, 2020. (Photo by Luis Licona/Xinhua)