How to say where are you from ? in chinese

你是哪国人？ nǐ shì nǎ ɡuó rén (Where are you from ? )

你 nǐ  = you 

是 shì = used like "be" before nouns or pronouns to identify, describe or amplify

                       the subject(is, am, are), etc.

哪 nǎ  = which/what ~ is used before a "measure word + noun "

国 ɡuó = country

人 rén =  people

Example :

A : 你是哪国人？nǐ shì nǎ ɡuó rén  ( Where are you from ? )

B : 我是印尼人。wǒ shì yìn ní rén  ( I am Indonesian )

NOTE : 印尼 yìn ní  ~ Indonesia

             人 rén  ~ people

 lanjut baca : how to use ni hao