A staple image in classical poetry conveying loneliness, parting, or the end of an era. Famous example: Li Yu's
相见欢 'flowering tree, late spring red' lines, and Liu Yong's
杨柳岸晓风残月 (yángliǔ àn xiǎo fēng cányuè, 'willow shore, dawn breeze, waning moon').
