a couple deeply in love
The Chinese idiom, Lu á NJI ā of è ngch ó u in pinyin, means that excellent people make friends or marry talented people and beautiful women. It comes from Shen Luan Jiao, Quemei, written by Li Yu in Qing Dynasty.
allusion
Li Yu of Qing Dynasty wrote in "Shen Luan Jiao · quematchmaker" that "if you unload the position in the middle palace, you will become a couple; if you have few companions, you will become a warbler and a swallow."
usage
It is a metaphor for couple.
a couple deeply in love
confront each other with daggers - jiàn bá nǔ zhāng