亲兄弟，明算帐

親兄弟，明算帳
qīnxiōngdì,míngsuànzhàng
even with your own brother, keep clear accounts (idiom)

CEDICT

Entry Composition

1 亲兄弟 qīnxiōngdì full-brother or half brother
2 明 míng
  1. bright
  2. opposite: dark 暗 àn
  3. (of meaning) clear
  4. to understand
  5. next
  6. public or open
  7. wise
  8. generic term for a sacrifice to the gods
3 算 suàn
  1. to regard as
  2. to figure
  3. to calculate
  4. to compute
4 帐 zhàng
  1. (bound form) curtain; tent; canopy
  2. variant of 账 zhàng