Su Shi
Genpox, on the night of October 12, 2006, took off his clothes and went to bed. He just saw the moonlight on the door and got up happily for a walk. Those who have nothing to do go to Chengtian Temple, look for Zhang Huaimin, stay awake with people and stroll in the atrium. In the moonlight, the courtyard is full of clear water, as clear as clear water. The algae and shepherd's purse in the water are the shadows of bamboo and cypress. Where there is no moon at night, there are no pines and cypresses, but there are few idle people like me.
The sentence describing the scenery here is: the courtyard is as empty as water, and the water is covered with bamboo and cypress.
It means: the moonlight in the courtyard is as clear and transparent as a pool of clear water, and the algae and grass in the water crisscross, all of which are the shadows of bamboo and cypress.