From Su Dongpo's "butterfly lovers", the original text is: Flowers Xie Hong Xing Xiao. Swallows fly, green water people go around. There are few willows blowing on the branches, but there are many herbs in the sea. Swing inside and outside the wall. The layman in the wall, the beauty in the wall laughs. Laughter dies in silence, but passion is mercilessly annoyed. Su Shi regretted that spring could not last forever, singing "Flowers wither, red apricots are small" and "There is less cotton on the willow branches". And cheer yourself up with "the grass in the sea is growing". How many years have passed, with the passage of time, I don't know who added "why unrequited love for a flower" after "lush grass in the sea", which became "lush grass in the sea, why unrequited love for a flower" and became the best inspirational slogan for future generations when they were lovelorn.