亡羊补牢

to fix a problem after a loss so it does not happen again. Learn the modern situation first; the old story is useful only after the idiom has a job.

better late than never; fix the root cause

Situation first

better late than never; fix the root cause

A chengyu is a compressed judgment about a situation. Random idiom sprinkling is how learners sound like a proverb calendar.

01 Name the situation Read the English meaning first. Know what kind of moment this idiom labels.

02 Hear four characters Play the chengyu and say it as one compact expression, not four isolated words.

03 Recall the use Log it, then use the chengyu quiz to match it to a modern situation.

Reading supports

Use these after the first listen. Pinyin is scaffolding; English is context; neither should become a sofa.

Literal meaning

mend the pen after losing sheep

A person lost sheep because the pen was broken. After repairing the pen, future sheep were protected.

Use it for incident reviews, process fixes, and learning after mistakes.

，。 This launch had problems, but improving the process now is still a useful fix.