What is the concept of classical gardens in China? How is it reflected?

Thought is the unity of heaven and man, heaven is nature and man is himself.

China's classical gardens must be made with mountains and waters, and the mountains and rivers are hidden in them, which adds the sense of movement to the whole garden. If you think I'm not clear enough, you can read carefully the paragraph in A Dream of Red Mansions in which Jia Zheng shows Baoyu and his guests to visit the newly-built Grand View Garden. The description of the scenery vividly expresses the essence of China's ancient gardening.