Cleaning the floors of the main media center for the Winter Games, January 18, 2022. /CFP

A COVID-19 countermeasures sign inside the main media center, January 18, 2022. /CFP

People visit the main media center, January 18, 2022. /CFP

The dining room of the main media center, January 18, 2022. /CFP

Banners for the Beijing 2022 along the highway to the Yanqing competition zone in northwest suburban Beijing. /CFP

An interactive Winter Olympics-themed installation at a subway station in Beijing. /CFP

Students who will serve at venues and city booths from late January till early April this year take a volunteer oath at Beijing Jiaotong University, January 18, 2022. /CFP

A mobilization ceremony for 428 students who will start 73-day closed-loop management as volunteers for the Beijing 2022 Winter Olympics is held at Beijing University of Aeronautics and Astronautics, January 18, 2022. /CFP

Some 50 people in Tongzhou District in eastern Beijing set up a volunteer team to welcome the upcoming Winter Olympics, January 18, 2022. /CFP