不打不成器 [－－－－－]

Jyutping bat1 daa2 bat1 sing4 hei3
Pinyin bù dǎ bù chéng qì

Definitions (CC-CEDICT)
  1. spare the rod and spoil the child (idiom)
Definitions (Wiktionary)
  1. proverb
    spare the rod and spoil the child