過猶不及 [过犹－－]

Jyutping gwo3 jau4 bat1 kap6
Pinyin guò yóu bù jí

Definitions (CC-CEDICT)
  1. too far is as bad as not enough (idiom, from the Analects)
Definitions (粵典–words.hk)
  1. 語句
    諺語​，​意思​係​「​太​多​」​同​「​唔​夠​」​一樣​都​係​唔​好​嘅
    a proverb that warns against excess; literally "too much is the same as not enough"
Definitions (Wiktionary)
  1. phrase, idiomatic
    doing too much is just as bad as not doing enough
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）