Teacher He (it seems to be He Jiong, a friend of mine told me about it N years ago. I wrote it down in a small notebook and still have it, but I have forgotten the name of the classmate) once told such a short story:
The angel and the human fell in love and lived happily.
But one day, when the angel has to return to heaven, don't be sad, dear, because he/she will still turn into the wind and come back to see you.
So...
When one day you feel that the wind blowing in your face is very familiar and gentle, it means that your angel lover has come back to see you...