厚積薄發 [－积－发]

Jyutping hau5 zik1 bok6 faat3
Pinyin hòu jī bó fā

Definitions (CC-CEDICT)
  1. lit. to have accumulated knowledge and deliver it slowly (idiom)
  2. good preparation is the key to success
  3. to be well prepared
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    good preparation is the key to success
  2. phrase, idiomatic, literally
    to gradually acquire knowledge, and make use of it when needed