Hi Meitao, this is a proverb meaning that nothing lasts forever, even the most boring task will be over eventually. If you analyse it literally, it means that sometimes a journey can seem very tedious if it is long and follows a straight road, but even the longest road in the world must come to an end and have a turn.

路必有彎; 事物有變. 指事情必有轉機, 用於安慰和鼓勵灰心喪氣的人.

It's about life in general and once you made a decision there's no turning back.

How do you think about the mixed marriage? Dose the divorce rate in the western country high?