After winning the two sprint distances at the 2004 Asian Championships, Ren Hui burst on the World Cup scene with several podium results and debuted at the World Single Distance Championships with a bronze medal in the 500 m. A year later, she seemed headed for at least a silver medal in the same distance in Inzell when she fell in the second run. Earlier in 2005, Ren had won two golds and a silver at the Winter Universiade in Innsbruck. She was considered a contender in Torino, after having placed fifth at the World Sprint Championships prior to the Games. After a fourth place in the first run, Ren took the second run to move up to the bronze medal. Although still active through 2009, Ren's international appearances in subsequent seasons have been rare and less impressive than in previous years.
Personal Bests: 500 – 38.01 (2007); 1000 – 1:15.39 (2007); 1500 – 2:05.16 (2005); 3000 – 4:57.35 (1999).