The hemp rope is specially chosen to be broken at the thin spot. The whole poem is: Thunder strikes a true filial son, and wealth makes a ruthless person; the hemp rope is specially chosen to be broken at the thin spot, and bad luck only seeks out the misfortune. The interpretation of this poem is that when lightning strikes, it only picks out filial sons to strike. Only by being ruthless can one get rich. The rope will always break at the thinnest place, and misfortune will always follow for those who are miserable. . Cutting the hemp rope at the thinnest point means that it will cause things to collapse and disintegrate, usually from the weakest part or link. The inspiration this sentence gives us is that people must pay attention to their own weaknesses. Weaknesses are often the most critical and fatal places for people.