sú huà shuō俗话说：làng浪zǐ子huí tóu回头jīn金bú不huàn换；kě可sú huà俗话yòu又shuō说：gǒu狗gǎi改bù不le了chī吃shǐ屎！
俗话说：浪子回头金不换；可俗话又说：狗改不了吃屎！
The saying goes: to turn a new leaf is priceless. The saying also goes: a dog can't change their habits of eating shit!
俗话说：一寸光阴一寸金；可俗话又说：寸金难买寸光阴！
There is a proverb that goes "time is money", but there is another one that goes "money can't buy you time".
俗话说：人不犯我，我不犯人；可俗话又说：先下手为强，后下手遭殃!
As the saying goes: As long as you don't offend me, I won't offend you. But there's another saying: To strike first means victory, to strike second means tragedy.