Poems describing the calmness of the water include: The half-acre square pond is opened, and the skylight and cloud shadows linger endlessly. It comes from Zhu Xi's "Seeing the Book", which roughly means: The water surface of the pond is like an open mirror, with the blue sky and white clouds reflected on it. Only when the water is calm can it be like a mirror. When the waves are rough, you cannot see the reflection.