Chinese phrase
有效期多久？ yǒu xiào qī duō jiǔ
Meaning
How long does it stay valid?
When to use it
Asks how long something remains valid. It is used for cards, documents, tickets, and similar items.
Example dialogue
这张卡 有效期多久？ zhè zhāng kǎ yǒu xiào qī duō jiǔ
How long does this card stay valid?
还有三个月，最好尽快换一张。 hái yǒu sān gè yuè zuì hǎo jǐn kuài huàn yì zhāng
There are three months left, so it would be best to replace it soon.