Half a month before the 2013 East Asian Games, Geng suffered a sudden knee injury and was told that she should not compete. She persisted, and was able to win the gold medal in the daoshu and gunshu combined event. A year later at the 2014 Asian Games, her four teammates forfeited from competition due to injuries and Geng felt pressured to win Hong Kong's only medal in the wushu event and to also defend her title from 2010. Despite a successful performance, she only won the silver medal in changquan. She made up this loss with an impressive showing at the 2015 World Wushu Championships where she won two gold medals, becoming world champion in changquan and gunshu. After this competition, Geng announced her formal retirement from competition and became an assistant coach for the Hong Kong Wushu Team.