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Jyutping caa1 ji5 hou4 lei4 , sat1 zi1 cin1 lei5
Pinyin chā yǐ háo lí , shī zhī qiān lǐ

Definitions (Wiktionary)
  1. proverb
    small discrepancies lead to great errors
    (syn.) 差之毫釐, 謬以千里, 谬以千里, 差之毫厘