Most people think that the difference between European and American stars and passers-by is very small. The difference between China stars and passers-by may be that we are still a little face-blind to foreigners. In the eyes of people in their country, those European and American stars must be much more prominent than passers-by, just as they think we are similar and can't tell stars from passers-by. Secondly, there is another possibility that the photos taken by European and American stars are more realistic, but the photos taken by stars in our country are exaggerated by professional retouchers.