The story: a man kept sheep; one day a wolf took one. A neighbour urged him to mend the pen, but he said fixing it after the loss was useless. The next day another sheep was lost. Regretful, he mended the pen at once - and never lost another sheep.
Moral: after a problem, do not just regret - fix it promptly to stop further loss. The idiom means repairing a fold after losing sheep: it is not too late to remedy.
Example: failing this exam is no big deal; start working hard now - better late than never.
Usage: often as "wáng yáng bǔ láo, wéi shí bù wǎn" (it is not yet too late).
In English: better late than never - an almost exact match.
Background: from the Strategies of the Warring States, advising rulers to heed counsel and correct mistakes; today it encourages cutting losses.
The tale: a shepherd pen has a hole; a sheep is lost overnight. He ignores neighbour advice; another is lost next day; only then he repairs the pen.
From Zhanguo Ce, it answers: is remedy after a problem too late? Answer: no.
"Wáng yáng bǔ láo" means: after a loss, take timely measures to avoid greater loss.
Its most moving quality is "timeliness" - when a problem arises, do not complain or flee; act at once. That is the best response.
Today it encourages: failed an exam, catch up; made a work error, fix it; feel unwell, see a doctor.
It also reminds: do not give up because "it is already late". Acting a little late beats never acting.
For learners it empowers: behind in study? Start catching up now; it is not late at all.
Remember: the sheep is lost, the pen can be mended; time has passed, action can still make up. It is never too late to mend.
Mending the fold is a kind of optimism: it believes remedy at any time is not too late. This optimism lets Chinese people, facing setbacks, always try again.
In history China mended folds many times: problems in systems were fixed; backward technology was chased. Timely mending means going further.
For individuals: starting today is always the best time. Remember these four characters and remember the power of not fearing a fresh start.
An easily missed detail: the shepherd ignored advice twice, but he actually repaired the pen in the end. That "actually repaired" is the point - action beats regret ten thousand times. Chinese say "action is the best language". Remedy imagined is not remedy; remedy done is. So if today you find many "sheep" lost - words unmemorised, grammar unclear - do not sit regretting; pick up the book now and mend the pen.
It is also a gentleness toward oneself: allow mistakes, but require correction. With such gentleness and firmness, you will walk ever steadier on the Chinese-learning road.
One-sentence summary: the past cannot change; the future can be mended. Every today is the best day to mend.