A man takes a selfie in front of a countdown clock showing 100 days until the opening of the 2022 Beijing Winter Olympic Games, in Wangfujing, Beijing, October 27, 2021. /CFP

Young players show off their ice hockey skills in celebration of the 100-day countdown to the Winter Olympics in Chongqing Municipality, southwest China, October 26, 2021. /CFP

People perform Tai Chi in front of a highway station to celebrate the 100-day countdown to the Winter Olympics in Zhangjiakou, Hebei Province, the co-host of Beijing 2022, October, 27, 2021. /CFP

A sterilization robot works in the Wukesong Sports Center where ice hockey events will be staged during the Beijing Winter Olympics, October 26, 2021. /CFP

People gather to celebrate the 100-day countdown to the Winter Olympics in Zhangjiakou, Hebei Province, the co-host of Beijing 2022, October, 27, 2021. /CFP

Beijing Winter Olympic Park is unveiled in Shougang Park in the west of Beijing to celebrate the 100-day countdown to the Winter Olympics, October 26, 2021. /Beijing Organizing Committee for the 2022 Olympic and Paralympic Winter Games

The sign in Beijing Olympic Park shows there are 100 days until the opening of the 2022 Beijing Winter Olympic Games, October 27, 2021. /CFP

The night view of Beijing Winter Olympic Park, which will host freestyle skiing and snowboarding events during the Games, October 26, 2021. /Beijing Organizing Committee for the 2022 Olympic and Paralympic Winter Games