Dong Feifei represented her nation at the 2009 World Single Distance Speed Skating Championships in the 1500 metres event, finishing 15th. She won the bronze medal at the 2011 Asian Speed Skating Championships in the 1500 metres event and won two gold and two silver medals at the 2009 Winter Universiade. At these championships she set with the Chinese team the Universiade speed skating record in the team pursuit. She also competed at other international competitions, including at ISU Speed Skating World Cups.