The blue sky, the yellow leaves on the ground, the waves of autumn colors, the cold smoke and green on the waves. In the nostalgic Su Mu Zhe written by Fan Zhongyan of the Song Dynasty, "blue sky, yellow leaves on the ground, autumn colors in waves, cold smoke and green on the waves" describes the clear water, blue sky, yellow leaves and smoke in autumn like a fairyland. The meaning of the poem is: The clear blue sky is dotted with blue clouds; the vast land is covered with withered yellow leaves; the boundless autumn colors stretch out and blend into the flowing river; the vast and sparkling river surface envelopes With the cold and desolate smoke, it was empty and green.