美中不足

měizhōngbùzú
everything is fine except for one small defect (idiom); the fly in the ointment

CEDICT

Entry Composition

1 美中 Měi Zhōng US-China
2 不足 bùzú
  1. insufficient
  2. lacking
  3. deficiency
  4. not enough
  5. inadequate
  6. not worth
  7. cannot
  8. should not