Do you know what a knife is poor and a knife is rich? This sentence is about betting on stones.

This is a China proverb, which means that a gambling may make people rich overnight, or they may be poor, or even forced to live in linen clothes. This sentence warns people not to indulge in gambling, because the result of gambling is uncertain and may bring serious consequences. Gambling on stones is a common way of gambling. People judge the value of stones according to their appearance and texture. But this kind of gambling is extremely risky, because even experienced stone gamblers are difficult to accurately judge the value of stones. Therefore, we should avoid participating in gambling activities and avoid unnecessary losses.