Dong was called up to the Chinese national team in 2005, and made his international debut in 2006.[2]
At the 2007 World Championships in Quebec City, Dong came in second in the individual event and won gold in the team event.[5]
At the 2008 Summer Olympics, he won the bronze medal in the individual event, the only trampoline event at the Olympics. His final score was 40.600.[2]
He won the 2009 World Championships Individual Championship at St. Petersburg, Russia. Team China successfully defended their crown to a consecutive gold medal.[5]
At the 2012 Summer Olympics, he won the gold medal with a score of 62.990.[2]
At the 2015 World Championships, he won his 10th career World Championship gold medal by winning the synchro event with Tu Xiao.
At the 2016 Summer Olympics, he won the silver medal with a score of 60.535.
In 2017, he won a gold medal in men's synchro at The World Games 2017 in Wrocław, Poland.
In 2018, he was first individually and in synchro at the Brescia World Cup. At the Maebashi World Cup, he was first in synchro; at the Loule World Cup he was fourth individually and fifth in synchro.[2] At the 2018 World Championships, he won individual silver with a score of 61.185. He ranked fifth in men's synchro and first in the team all-around.
At the 2019 Baku World Cup, Dong was second individually. At the World Championships he won individual bronze and team silver.
At the 2020 Baku World Cup, Dong won individual bronze.[2]
In 2021, he won the silver medal in the men's trampoline event at the 2020 Summer Olympics in Tokyo, Japan.[6]
_Beijing_2008.jpg)
