How do we redirect to a specified page according to what country the user is?

[joseph]

I don't know if this is already posted or not, not sure how/what term to search for.

 

I'm trying to make the root index.php to automatically redirect to the page if the user browsing the index.php is from a specified country.

 

Like for example:

US user browses index.php -> automatically redirected to /en/index.php

India user browses index.php -> automatically redirected to /in/index.hp

China user browses index.php -> automatically redirected to /cn/index.php

 

May I know how to do this?