Three-body poetry has always been a popular form of poetry in China culture. Ancient poets in China often wrote three-line poems, such as "The vast grass crosses the plain and comes and goes with the four seasons" in Bai Juyi's Farewell to Ancient Grass. "Wildfire won't devour them, they grow taller in the spring breeze" is a typical three-line poem. In modern literature, three-body poems have also been widely created, such as "a stamp, a boat ticket, a grave, I send acacia" in Yu Guangzhong's Homesickness, which is one of the three-body poems.
In addition to poetic form, "three lines" can also refer to a way of thinking. For example, "three-line thinking" in Japanese refers to a way of thinking called "three-line thinking", which requires dividing the problem into three parts and then thinking about these three parts separately, so as to solve the problem more comprehensively and systematically. "Three lines" is a form of poetry and a way of thinking. It has the characteristics of conciseness, conciseness and profundity, which enables people to better express their thoughts and solve problems.