亡羊补牢 (wángyáng-bǔláo) is an HSK 7-9 Chinese word. Its most common English meaning is lit. to mend the pen after sheep are lost (idiom); depending on context, it can also mean fig. to act belatedly or better late than never. Read the examples below to choose the meaning that fits the sentence.
01lit. to mend the pen after sheep are lost (idiom)
02fig. to act belatedly
03better late than never
04to lock the stable door after the horse has bolted