因人成事

yīnrénchéngshì
to get things done relying on others (idiom); with a little help from his friends

CEDICT

本身没有能力，依靠他人的力量完成事情。

重編國語辭典

Entry Composition

=1 因 yīn old variant of 因 yīn
=1 因 yīn
  1. cause
  2. reason
  3. because
2 人 rén person; people

classifiers: 個, 位
3 成事 chéngshì
  1. to accomplish the objective
  2. to succeed