In 2009, Deng won the gold medal at the 11th National Games, raising her national ranking to first. She finished 21st in the All-around final at the 2010 World Championships in Moscow, Russia. Deng won a bronze medal in Hoop at the 2011 Summer Universiade and won the bronze medal in all-around at the 2011 Asian Championships. She then represented China at the 2011 World Championships where she finished 13th in the All-around.