What do you mean, "The Great Tiger became stupid and looked like an ordinary person"?

Daxian refers to Lu merchants. Tiger change refers to the brilliance of the updated tiger skin. "Brother One" has a phrase "great man mutation", which is generally used to describe people who are talented and unpredictable.

Meaning; Very talented people are changeable, but fools are unpredictable. What is the difference between Lu Shang's behavior before he became rich and ordinary people?