墨守成規 [－－－规]

Jyutping mak6 sau2 sing4 kwai1
Pinyin mò shǒu chéng guī

Definitions (CC-CEDICT)
  1. hidebound by convention (idiom)
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, idiomatic
    to rigidly adhere to old rules or traditions without changing
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）