Perhaps it is because of my separation from my sweetheart that I feel sad.
It is because the heart feels something that it is easy to get hurt.
Fragrant and beautiful flowers can't make people feel happy, but they are sad because of the happy scenery, which leads to tears at the sight of flowers (or "the place where petals flow like tears");
At night, butterflies fly, which makes people who are addicted to missing more sleepless (if butterflies are paired, they will be in contrast with their loneliness; If the butterfly flies alone, it will make people feel sorry for themselves.
Well, that's basically the understanding. It's a pity that I don't know where this word comes from.