The thoughts and feelings expressed are in A Dream of Red Mansions. It can be seen that in that flattering era, the author lamented that there was no talent in the world of mortals to make up for the waste of life. As a result of long-term self-sighing, pessimism and world-weariness, the idea of nothingness in life came into being, so Song of Goodness was born, and the nothingness in life expressed in Song of Goodness was the same as that expressed by Su Shi in Nian Nujiao (No Return to the River). "Think back to Gong Jin, when Joe got married for the first time, he was handsome and brave. Feather fan nylon scarf, talking and laughing, all gone. Old country fugue, affectionate Ying Xiao Wo born early. Life is like a dream, and statues are still on the moon. " This is the feeling that Su Shi lamented his incompetence when he was demoted to Huanggang. Because he has no chance to make a career for the country and the people, he can only have nihilistic thoughts in a helpless mood. Since Cao Xueqin saw that the Qing court was about to fall, he could do nothing to make up for it, and he was deeply down and out. He could only sigh for his lack of talent. In Song of Goodness, he regards fame, money, a good wife, children and grandchildren as nothingness, that is, success or failure, and they are all empty after death. This nihilistic thought is the inevitable result of extreme sigh and sadness.