槍打出頭鳥 [枪－－头鸟]

Jyutping coeng1 daa2 ceot1 tau4 niu5
Pinyin qiāng dǎ chū tóu niǎo

Definitions (CC-CEDICT)
  1. the shot hits the bird that pokes its head out (idiom)
  2. nonconformity gets punished
Definitions (Wiktionary)
  1. proverb
    One who is in the forefront will be attacked first. / The nail that sticks out gets hammered down.