What makes Wenzhou people rich?

Wenzhou people themselves say that they made their fortune by their unremitting efforts, but in fact, China has more people who work harder than them, so they made their fortune not because of their efforts, but because they have no bottom line. Generally speaking, people are invincible when they are cheap, and the bottom line of morality is untouchable by others and even unwilling to cross it directly. This is the fundamental factor of their wealth.