不撞南牆不回頭 [－－－墙－－头]

Jyutping bat1 zong6 naam4 coeng4 bat1 wui4 tau4
Pinyin bù zhuàng nán qiáng bù huí tóu

Definitions (CC-CEDICT)
  1. to stubbornly insist on one's own ideas (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be stubborn and refuse to give up or repent until one has experienced failure