Why did some ancient literati call themselves "mountain people"

Mountain people generally refer to hermits; Also refers to Shan Ye people, modest; In the old society, people who took divination and fortune telling as their profession were sometimes called "mountain people". Most of them appear in ancient poems and in the names of literati.

Under the infiltration of China's Confucianism and Taoism, the ancient intellectuals in China "help the world if they are rich, and protect themselves if they are poor", aiming at "making the monarch Yao and Shun superior and then purifying the customs"; But once you encounter setbacks, it's another scene: "I'm not satisfied with the world today, and tomorrow I'll let go of my hair and take a fishing boat", or I'm lying in the nymphs, or I'm plowing Shan Ye, or I'm sending my love to the mountains and rivers. Although the former is the pursuit goal of literati, the latter is also respected by people and called a "hermit".