Representation refers to the image of things that people appear in their heads when things are not in front of them. It has the characteristics of intuitiveness, generalization, and operability, and plays an important role in image thinking. According to the above definitions, Which of the following are appearances:. ["People who have not seen the winter in the north can form a scene of the northern kingdom in their minds by reading Mao Zedong's poem Qinyuan Spring · Snow.", 'Pig Bajie is a figure abstracted by Mr. Wu Chengen.', 'When a child looks at a painting for a few minutes and closes his eyes, he can still clearly remember every detail of the painting.', 'When people read about the vivid appearance of Lin Daiyu in A Dream of Red Mansions, they seem to see Lin Daiyu standing in front of her eyes.']