乌鸟私情 (烏鳥私情) wū niǎo sīqíng

wū niǎo sīqíng noun the solicitude of the crow (who provides for his old parent); filial piety
Domain: Idiom 成语 , Subdomain: , Concept: Bird 鸟
Notes: (CC-CEDICT '烏鳥私情')