The husband and wife advance together in their careers, side by side.
Tips
history
From the 《尔雅·释地》 description of the mythical 比翼鸟 of the south: a bird with only one wing, so two must fly bonded together. The image became the canonical metaphor for inseparable lovers - Bai Juyi's 《长恨歌》 immortalizes it: 在天愿作比翼鸟，在地愿为连理枝.
register
Strongly congratulatory; the standard idiom in wedding speeches and toasts. Also used figuratively for any two people pursuing the same goal in tight coordination - partners, co-founders, scholars.
Cantonese banquet dish: pairs of fried chicken wings glazed in sweet-sour sauce, named for the 'flying together' wordplay (翼 = wing). Often served at wedding banquets.
