Several ways of expression of homesick poems

In the long and massive writing process, homesickness poems in ancient and modern times have formed several artistic expression modes that have been continuously used, such as homesickness at high altitude, homesickness at full moon, homesickness at festivals, homesickness in the distance, homesickness in autumn wind and dusk, and so on. The formation of each expression is based on the "poetic embryo" and "poetic ancestor" mentioned in China's ancient poetics. Because the original works with the nature of "poetic embryo" and "poetic ancestor" can accurately express people's behavior and psychology in similar situations, they are often imitated by later poets in similar situations, which is an expression in the process of continuous imitation and writing by later poets. The "poetic embryo" and "poetic ancestor" mentioned in China's ancient poetics are similar to the "motif" and "prototype" in western literary theory. Works originated from the same poetic embryo, that is, the prototype of motif, have basically the same theme and technique. The so-called expression includes two aspects: theme and technique.