Kai Tak International Airport, already the busiest in the world, is currently gushing with waves of returning emigrants who have "just finished singing the national anthem" (that is, just acquired foreign citizenship).
啟德機場原本就是全世界最繁忙的機場之一，現更湧進一波波剛「唱完國歌」（拿到外國籍）的回流移民。