Fu, Bi and Xing originated from The Book of Songs and became the traditional expression of China's poetry, which was reflected in all later poems and other literary creations. For example, Liu Yuxi's "Zhi Zhu Ci" in the Tang Dynasty: Peach blossoms are all over the sky, and spring water hits mountain streams in the middle of Shu. A girl saw it and thought that her husband's love was as fleeting as this peach blossom, and infinite sadness was like this endless river of water. The metaphor used is typical.
Modern people are also using these technologies. For example, students often write "how about grass, how about eagle, how about bamboo" at the beginning of their compositions, and then write about people.