Qianlong for six years (174 1). Less addicted to learning, engineering poetry. After middle age, he gave up his career and lived in seclusion in the mountains, known as "Cishan". Play the piano, write poems, write Zhu Lan, and copy seals to amuse yourself. Cao Shi's writings are rich and unique. There are 9 volumes of Chanhe Pavilion Poems, 2 volumes of Litong, Qin Xue Neipian 1 volume, Waipian 1 volume, Tang Wei Ji Sheng, Ji Xu and so on. Six macro works, such as Yi Zhun and Shi Xiao, are mostly collected in Sikuquanshu. There are five volumes of health monographs, namely "Lao Heng Yan" (also known as "Health Essays"), which are simple in content and easy to implement. Cao is a violinist, painter and calligrapher. He often plays the piano to nourish his heart and enjoys painting and calligraphy. In addition to advocating emotional harmony, nourishing the heart and nature, being cautious in daily life, keeping warm and cold, Yujia also attaches importance to diet and regulating the spleen and stomach.

He believes that improper diet is harmful to the spleen and stomach, and points out that "the spleen and stomach are the foundation of the day after tomorrow, and it is necessary to regulate the spleen and stomach in old age." It is also believed that "the deficiency of stomach yang leads to all diseases, and the deficiency of spleen yin leads to all evils." Therefore, controlling diet and regulating the spleen and stomach will help the normal digestion and transfer of diet, subtly ensure the nutrition of all parts of the human body, and lead to health and longevity.