比翼齐飞

(flying) wing to wing

lit. a pair of birds flying close together (idiom); fig. two hearts beating as one

lit. to rest and fly together (idiom); fig. to live in each other's pockets

lit. a pair of mythical birds who depend on each other; fig. an inseparable couple

lit. twin lotus flowers on one stalk; fig. a devoted married couple

(of a couple) to grow old together in mutual respect (idiom)