(idiom) describes music or literature that is profoundly affecting or lingers in the mind

The title of a poem in the "Songs of Chu" ([[楚辞|楚辭|chu3 ci2]]) written by Liu Xiang during the Western Han dynasty. It consists of nine sections expressing grief and admiration for the poet Qu Yuan.

the wagtail bird, also used figuratively to represent brotherly affection and mutual support during times of distress

Jin Shengtan (c. 1608-1661), a famous literary critic of the late Ming and early Qing dynasties; known for his influential commentaries on popular works such as [[水浒传|水滸傳|shui3 hu3 zhuan4]], [[三国演义|三國演義|san1 guo2 yan3 yi4]], and [[西厢记|西廂記|xi1 xiang1 ji4]].