“Green Fields,” Inspired by the National Forest Reserve, mainly expresses the blueprint of harmonious coexistence between man and nature. From the human trees in the distance and the lush trees on both sides of the painting, we can see that people at this time have realized how important the environment is to us. The gradient color in the sky and the sky in some places in real life serve as a contrast to warn contemporary people that if they want to see beautiful scenery, they must act now.