Curlers compete in a mixed curling match as a part of the "Experience Beijing" ice sports testing series leading up to 2022 Winter Olympics at the National Aquatic Center, now known as the Ice Cube in Beijing, China, April 9, 2021. /CFP

As the National Aquatic Center or the Water Cube, the venue housed the swimming and diving events in the Beijing 2008 Summer Olympics and was now transformed to serve the upcoming 2022 Winter Olympics. /CFP

Inside of the Ice Cube during the transformation process into a curling rink in Beijing, China, November 29, 2020. /CFP

The four Olympic-standard curling rinks are ready for testing inside the Ice Cube in Beijing, China, March 12, 2021. /CFP

Curlers during a mixed curling match part of a series of test events to gauge the venue readiness for 2022 Winter Olympics in Beijing, China, April 1, 2021. /CFP

Curlers during a mixed curling match at the Ice Cube in Beijing, China, April 1, 2021. /CFP

Technical staff monitor the mixed curling match at the Ice Cube in Beijing, China, April 1, 2021. /CFP

Medical workers watch players compete during the curling competition, a test event for the 2022 Winter Olympics at the Ice Cube in Beijing, China, April 1, 2021. /CFP