大有裨益

dàyǒubìyì
  1. bringing great benefits (idiom); very useful
  2. of great service
  3. to help greatly
  4. to serve one well

CEDICT

Entry Composition

1 大有 dàyǒu
  1. there is a great deal of ... (typically followed by a bisyllabic word, as in 大有希望 dàyǒuxīwàng)
  2. (literary) bumper harvest; abundance
2 裨益 bìyì
  1. benefit
  2. advantage
  3. profit
  4. to be a benefit to