2021 International Mathematical Olympiad

The 2021 International Mathematical Olympiad was the 62nd International Mathematical Olympiad held in each participant's country due to COVID-19 pandemic but held in Saint Petersburg, from July 14 to July 24, 2021.
China was the victorious country, and Yi Chuan Wang the overall winner with a perfect score.
Background.
At first, the Olympiad was going to be organized in Washington, D.C., United States, but due to the COVID-19 pandemic in the United States it was decided to be held in Saint Petersburg, same place as for 2020 International Mathematical Olympiad, but online due to COVID-19 pandemic.