Pakistan arming has interesting implications for China. On one side they are faced with Japan and S. Korea arming in response to N. Korea. On the other they are faced with an ongoing nuclear arms race between India and Pakistan.

Note: Biological/Chemical weapons are far superior to nukes because they are more effective over a wider range and don’t damage infrastructure. Ideally you could “re-colonize” without having to rebuild as opposed to nukes which destroy everything.