Idiom 成語 4

物极必反(wù jí bì fǎn) means:

When things reach an extreme, they will inevitably reverse.

English meanings:

Extremes meet their opposite

Things turn around when they go too far

What goes to an extreme must reverse

Explanation:
This Chinese idiom expresses the idea that when something develops to its highest or most extreme point—whether good or bad—it will eventually change in the opposite direction.