Kū shuǐ shuǐ de bō wén

Quick answer：

The term 'kū shuǐ shuǐ de bō wén' refers to the wave patterns in the art style of karesansui, also known as Zen rock garden. Karesansui is a Japanese art form that uses carefully arranged rocks, sand, and gravel to represent a landscape in a minimalist style. The 'kū shuǐ' translates to 'dry landscape,' emphasizing the absence of water which is represented by the sand ripples.