Basic explanation

This refers to Taoism, but it was swallowed to pray for a long life. Later, it also means that appreciating landscape painting has the effect of pleasing to the eye and keeping in good health.

Source: Chen Jiru's "Mud Ancient Record" in the Ming Dynasty Volume III: "Huang Da is 90 years old and looks like a child's face. Zhu Youren has more than 80 gods who are immortal and disease-free, painting cigarettes." In the Qing Dynasty, Qian Daxin wrote the poem "The Eighty-year-old Man in Liangshan Prefecture": "Take the first place in the West Lake, and the cloud supports thousands of people. The door is covered with the word "Manshuo Mountain Boat", and people know the beauty of the woman kilometers. " Wang Shizhen's Notes on Xiangzu in the Qing Dynasty (Volume 12): "I am thinking, and my illness is getting worse, while Huang Dachi, Cao Yunxi, Shen, Wen Hengshan, etc. all suffer from painting and are happy to see the New Year. People call it a smoke cloud. "