無關痛癢

无关痛痒
wúguāntòngyǎng
(idiom) to not affect sb; irrelevant; of no importance; insignificant

CEDICT

to be unrelated to one's own interests

Wiktionary

對於切身利益的事毫不在意。

重編國語辭典

對於切身利益的事毫不在意

維基詞典

Entry Composition

1 無關 wúguān
  1. unrelated
  2. having nothing to do (with sth else)
2 痛癢 tòngyǎng
  1. pain and itch
  2. sufferings
  3. importance
  4. consequence