精益求精

jīngyìqiújīng
(idiom) to constantly seek to improve; to keep perfecting

CEDICT

Entry Composition

1 精 jīng
  1. essence
  2. extract
  3. vitality
  4. energy
  5. semen
  6. sperm
  7. mythical goblin spirit
  8. highly perfected
  9. elite
  10. the pick of sth
  11. proficient (refined ability)
  12. extremely (fine)
  13. selected rice (archaic)
2 益 yì
  1. benefit
  2. profit
  3. advantage
  4. beneficial
  5. to increase
  6. to add
  7. all the more
3 求 qiú
  1. to seek
  2. to look for
  3. to request
  4. to demand
  5. to beseech
4 精 jīng
  1. essence
  2. extract
  3. vitality
  4. energy
  5. semen
  6. sperm
  7. mythical goblin spirit
  8. highly perfected
  9. elite
  10. the pick of sth
  11. proficient (refined ability)
  12. extremely (fine)
  13. selected rice (archaic)