to use the same tactics as one’s opponent
以其人之道还治其人之身 (yi qiren zhi dao huanzhi qiren zhi shen)
"When negotiations failed, they decided to fight fire with fire."
"当谈判失败时,他们决定以其人之道还治其人之身。" (dang tanpan shibai shi, tamen jueding yi qiren zhi dao huanzhi qiren zhi shen)
someone who is very similar to their parent
to be extremely worried or upset
to make a mistake or do something badly
to laugh very loudly or uncontrollably
being kind doesn’t take effort or money
to adjust oneself to new situations or changes