一石两鸟
yī​shí​liǎng​niǎo

to kill two birds with one stone

  1. 一 yī numeral
    one
    one; the number 1; single; alone
  2. 石 shí noun
    stone
    rock; stone; (bound form) made of stone; rock-like
  3. 两 兩 liǎng numeral
    two
    two; used before most measure words, with the number ten, or with large units like thousand or ten thousand; also used for things that come in pairs
  4. 鸟 鳥 niǎo noun
    bird
    bird; feathered vertebrate with wings and a beak