She won a gold medal, as a member of the Chinese women's kayak four team, at the 2010 Asian Games in Guangzhou, China, with a time of 1:34.440.Ren represented China at the 2012 Summer Olympics in London, where she competed in the women's K-4 500 metres, along with her teammates Yu Lamei, Liu Haiping, and Li Zhangli.
Ren and her team, however, fell short in their bid for the final, as they finished last in the semi-final round by eighteen hundredths of a second (0.18) behind the Serbian team (led by Antonia Horvat-Panda), recording the slowest time of 1:34.004.