The duet speaks of the infinite but tragic like involving Chang'e and Houyi, who will be dependant on the Chinese myth with the moon goddess, upon which the film relies on. Between several artists who have recorded variations of "Always and Forever" would be the American R&B vocal group Whistle, https://always-and-forever-mine27150.blogsidea.com/43663997/what-does-always-and-forever-mean