A combination photo shows the four masks three-year-old Shi Zhixuan changed during practice at home in Guilin, a tourist resort in southwest China's Guangxi Zhuang autonomous region, Aug 20, 2012. Face change is a famous skill mostly used in Sichuan Opera to demonstrate sudden changes of the role's emotions. Shi Zhixuan started to learn the skills of changing face half a year ago, and now she has a good command of face changes in four categories. [Photo/Xinhua]