Herdsmen ride camels at the opening ceremony of a winter Nadam fair in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. Nadam Fair, meaning "entertainment" or "recreation" in Mongolian, is a mass traditional Mongolian festival mainly filled with sports events. (Photo/China News Service)

People take part in the winter Nadam in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. (Photo/China News Service)

Herdsmen ride horses at the opening ceremony of a winter Nadam fair in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. Nadam Fair, meaning "entertainment" or "recreation" in Mongolian, is a mass traditional Mongolian festival mainly filled with sports events. (Photo/China News Service)

Herdsmen ride horses at the opening ceremony of a winter Nadam fair in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. Nadam Fair, meaning "entertainment" or "recreation" in Mongolian, is a mass traditional Mongolian festival mainly filled with sports events. (Photo/China News Service)

People of Ewenki ethnic group shows sleighs pulled by reindeers at the opening ceremony of a winter Nadam fair in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. Nadam Fair, meaning "entertainment" or "recreation" in Mongolian, is a mass traditional Mongolian festival mainly filled with sports events. (Photo/China News Service)

Women take part in the winter Nadam in Hulun Buir, north China's Inner Mongolia Autonomous Region, Dec. 23, 2019. Nadam Fair, meaning "entertainment" or "recreation" in Mongolian, is a mass traditional Mongolian festival mainly filled with sports events. (Photo/China News Service) (Photo/China News Service)