Hook, hang, 100 unchanged. Why do you say that?

This sentence is often used to describe a situation or state that has not changed for a long time. The specific source is unknown, and it may come from folk proverbs. Among them, "hook" means that the buckle (hook) is fastened and cannot be pulled open. For example, when two people shake hands, they cross their thumbs with the other hand. This is a retractor. And "hanging by hanging" refers to the way of hanging yourself with a rope around your neck, which means that if you are abandoned by someone you love deeply or your life is in a desperate situation, you choose to leave this world and never change. As for "100 years unchanged", it means that a certain state or situation remains unchanged for a long time.