zài tiān yuàn zuò bǐ yì niǎo , zài dì yuàn zuò lián lǐ zhī
In the sky to be two birds flying wing to wing, on earth to be two trees with branches intertwined
wishing for conjugal bliss
bǐ yì shuāng fēi
lit. a pair of birds flying close together (idiom)
fig. two hearts beating as one
name of a sweet and sour chicken wing dish
bǐ yì qí fēi
to fly wing to wing (idiom)
two hearts beating as one
(of a couple) inseparable