堅持不渝

坚持不渝
jiānchíbùyú
to stick to sth without change (idiom); to persevere

CEDICT

Entry Composition

1 堅持 jiānchí
  1. to persevere with
  2. to persist in
  3. to insist on
2 不渝 bùyú
  1. constant
  2. unchanging
  3. abiding
  4. faithful