兵来将敌,水来土堰

bīng lái jiàng dí , shuǐ lái tǔ yàn

counter soldiers with arms, water with an earth weir (idiom); different situations call for different action

to adopt measures appropriate to the actual situation

bīng

soldiers

lái

to come

jiàng

(bound form) a general

(bound form) enemy

,

shuǐ

water

lái

to come

earth

yàn

weir