It comes from the German philosopher Gottfried Wilhelm Leibniz and was later adapted.

It is said that Leibniz once served as a "palace advisor". Once, the emperor asked him to explain a philosophical issue. Leibniz said to the emperor that everything has the nature of nature.

The emperor didn't believe it, so he asked the maids to go to the imperial garden to find a bunch of leaves. Leibniz indeed found their similarities in these leaves, and the emperor admired them very much. At this time, Leibniz said: "Everything is different" and "There are no two identical things in heaven and earth."

After hearing these words, the palace ladies once again walked into the imperial garden to find two completely indistinguishable leaves, hoping to overturn the philosopher's conclusion.

As a result, the leaves on the trees all seem to be the same, but after careful comparison, they have different shapes and have their own particularities.

Gottfried Wilhelm Leibniz (July 1, 1646 - November 14, 1716), a German philosopher and mathematician, one of the few in history A generalist, he was known as the Aristotle of the seventeenth century. He himself is a lawyer who often travels to major towns. Many of his formulas are completed on bumpy carriages. He also claims to have the noble status of a baron.