兵來將擋,水來土掩 [ㄅㄧㄥ ㄌㄞˊ ㄐㄧㄤˋ ㄉㄤˇ , ㄕㄨㄟˇ ㄌㄞˊ ㄊㄨˇ ㄧㄢˇ; bing1 lai2 jiang4 dang3 , shui3 lai2 tu3 yan3]
  counter soldiers with arms, water with an earth weir (idiom); different situations call for different action
  to adopt measures appropriate to the actual situation
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