Change it if it exists, and encourage it if it doesn’t. ——Zhu Xi

It is never too late to correct a mistake when you realize it. ——Shakespeare

Everyone makes mistakes, but only fools will not correct their mistakes. ——Cicero

Don’t rush to write, don’t hate revising, but rewrite the same thing ten or twenty times. ——Tolstoy

It is not a bad thing, let alone a shame, for a person to take detours and make mistakes on the road of scientific exploration. He must have the courage to admit and correct mistakes in practice. ——Einstein

Fractal geometry not only shows the beauty of mathematics, but also reveals the essence of the world, and also changes the way people understand the mysteries of nature; it can be said that fractal geometry is the geometry that truly describes nature. Research on it has also greatly expanded the realm of human cognition. ——Zhou Haizhong