In the end, the Empress declared Xiao Yu the winner of the competition. Princess Yijia was not convinced, but the Empress did not argue with her, simply telling her to do a handstand or splits instead.
Princess Yijia's dance was beautiful, but her flexibility was nowhere near that of Shen Xiaoyu, who practiced yoga every day. Dance moves only require a touch, not the deep practice of yoga, with a set of movements for the shoulders, neck, waist, and legs each day that can penetrate the whole body.
Therefore, what Princess Yijia could do, Shen Xiaoyu could do easily, but what Shen Xiaoyu did, Princess Yijia might not be able to do.
Whether it was a shoulder handstand or some other more difficult postures, as soon as she gave a demonstration, Princess Yijia knew she couldn't complete them.
So what if Princess Yijia felt unsatisfied with her loss? Who asked her to be unable to do it?