How do you write where are from in mandarin symbols?

You can't write "where are you from" directly in Mandarin symbols.

You would need to express this question in two parts:

1. "Where" in Mandarin is 哪里 (nǎ lǐ)

2. "Are you from" in Mandarin is 你来自哪里 (nǐ lái zì nǎ lǐ)

So the full phrase would be: 你来自哪里? (nǐ lái zì nǎ lǐ?)

This literally translates to "You come from where?" but it conveys the meaning of "Where are you from?"