Explain it with a story: I have a classmate in high school, who is very tall, has exquisite facial features and looks very harmonious. She loves reading, and always talks about literature with her mother at home, so she always has a gentle and elegant atmosphere. After the college entrance examination, we parted ways and didn't contact each other, but I heard something interesting about her. She had a whim to take an artistic photo. When she took photos, the people in the studio saw the effect very well, so they invited her to be a model and let her take wedding photos. She also took wedding photos without taking any money from her previous art photos. The key is that there are rewards. Hearing this, the hearts of a group of our friends are bleeding. Sure enough, people with high values are treated differently. We ordinary people spend so much money to shoot, which may not have satisfactory results. People are not only free, but also paid.