Blocking all posts from China and Korea

I have possibility to reject mails based on IP details. How do I
construct my filter so as to reject all mails from China and Korea?

NSP

n o s p a m p l e a s [ Fr, 09 Februar 2007 12:17 ] [ ID #1624849 ]

Miscellaneous » comp.mail.misc » Blocking all posts from China and Korea