Guan Chenchen(C), Li Qi(L) and Liu Tingting, members of China's women gymnastic team, are seen during training at Chow's Gymnastics and Dance Institute in West Des Moines, Iowa, the United States, on Dec. 27, 2017. Four Chinese women gymnasts have been attending a 20-day training program since Dec. 11. (Xinhua/Yin Bogu)