It’s not original. “There is no grass anywhere in the world.” It comes from Su Dongpo’s “Butterflies in Love with Flowers”. The original text is: The flowers have faded to red and green, and the apricots are small. Speaking of which, “There is no grass in the world, why should you fall in love with a flower unrequitedly?”

There is a story about the origin of the concept. It is said that in ancient times, there was an association of gourmets in the capital, and most of its members were "good eaters." One day, the person in charge of the association was dismissed for violating the law and had to stay away from the capital. Friends held a banquet to send the food.

Looking at the fine wines and delicacies at the banquet, the person in charge of the association could not help but sigh with infinite emotion. His infinite nostalgia for the food in the capital was fully revealed. The friend knew that the person in charge was worried that he would miss the food if he left the capital. After much thought, he tried to persuade him: Although the food in the capital is good, it is not good.

Enough.