牽一髮而動全身 [牵－发－动－－]

Jyutping hin1 jat1 faat3 ji4 dung6 cyun4 san1
Pinyin qiān yī fǎ ér dòng quán shēn

Definitions (Wiktionary)
  1. phrase, idiomatic
    A slight change will affect everything else.

牽一髮而動全身 [牵－发－动－－]

Jyutping hin1 jat1 faat3 ji4 dung6 cyun4 san1
Pinyin qiān yī fà ér dòng quán shēn

Definitions (CC-CEDICT)
  1. lit. pull one hair and the whole body moves
  2. fig. a slight change will affect everything else
  3. the butterfly effect
Definitions (粵典–words.hk)
  1. 語句
    改一​小部份​就​已經​影響​全局
    a slight change in one part may affect the whole situation; literally: pull a single hair and move the body
Definitions (Wiktionary)
  1. phrase, idiomatic
    A slight change will affect everything else.
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）