Zhang Jike
Liu retired after the 2001 season and was appointed as the head coach of the China's National Men's Team at the age of 27. As the head coach of the Chinese Men's National Table Tennis Team he is the most successful coach in history with a team gold medal at the 2008 Summer Olympics in addition to the medal sweep by Ma Lin, Wang Hao, and Wang Liqin. At the 2012 Summer Olympics the team won gold and Zhang Jike and Wang Hao won gold and silver medals respectively in the men's singles. At the 2016 Summer Olympics the team again won gold and Ma Long and Zhang Jike won the gold and silver medals in the men's singles.