He is an Olympic champion and four-time medalist, winning gold at London 2012, silver at Rio 2016 and Tokyo 2020, and bronze at Beijing 2008.

[1][4] Dong was called up to the Chinese national team in 2005, and made his international debut in 2006.

Team China successfully defended their crown to a consecutive gold medal.

In 2017, he won a gold medal in men's synchro at The World Games 2017 in Wrocław, Poland.

[2] In 2021, he won the silver medal in the men's trampoline event at the 2020 Summer Olympics in Tokyo, Japan.