行百里者半九十 [－－－－－－－]

Jyutping hang4 baak3 lei5 ze2 bun3 gau2 sap6
Pinyin xíng bǎi lǐ zhě bàn jiǔ shí

Definitions (CC-CEDICT)
  1. lit. ninety li is merely a half of a hundred li journey (idiom)
  2. fig. the closer one is to completing a task, the tougher it gets
  3. a task is not done until it's done
Definitions (Wiktionary)
  1. proverb
    Things become more difficult when we approach closer to success
    (syn.) 行百里者半於九十, 行百里者半于九十