Chinese phrase
延期最多几天？ yán qī zuì duō jǐ tiān
Meaning
What is the maximum number of days it can be postponed?
When to use it
This asks how many days something can be postponed at most. It is used to ask about a permitted delay in a practical, polite way.
Example dialogue
我的签证还没下来，报到能延期最多几天？ wǒ de qiān zhèng hái méi xià lái bào dào néng yán qī zuì duō jǐ tiān
My visa is still pending. How many days can check-in be postponed?
学校一般允许最多30天，但要联系国际学生办公室。 xué xiào yì bān yún xǔ zuì duō 30 tiān dàn yào lián xì guó jì xué shēng bàn gōng shì
The school usually allows up to 30 days, but contact the international student office.