During the National Day holidays in October, Li Jingning, a junior of Chang'an University, worked as a part-time model in the International Auto Expo held in Xi'an, capital of northwest China's Shaanxi province.

During the working day, she got up at 7 a.m. every day to put on the heavy makeup and high-heel shoes. On the stage, she kept smiling and stood for hours. Sometimes, she had to suppress sudden physical troubles such as sneeze, itch and the desire to go to toilet. She understood that the hard working is the only secret to the beauty of the models on the stage.