syu1 dou3 jung6 si4 fong1 han6 siu2書到用時方恨少书到用时方恨少

Jyutpingsyu1 dou3 jung6 si4 fong1 han6 siu2
Yalesyū dou yuhng sìh fōng hahn síu
語句

Definition

To regret learning too little when one actually needs to apply the knowledge.

writtenschoolother

How it's used

This is a classic idiom often used in a self-deprecating or admonishing tone when someone realizes their lack of preparation or study has left them helpless in a practical situation. It carries a heavy sense of irony because the speaker is usually acknowledging their past laziness while facing a current consequence. It is frequently used to encourage students or younger people to value their education before they enter the workforce.

Examples

I regret not studying more now that I need the knowledge; I wish I had studied harder back then.
What is the point of regretting your lack of knowledge now that you actually need it?

Common phrases

to regret not having studied enough when the time comes to use the knowledge

Common mistake

Learners often mistake this for a simple statement about reading books, but it specifically refers to the functional application of knowledge rather than the act of reading itself. It is a set phrase and should not be broken up or modified with additional particles.

Grammar color guide

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