Al Jazeera had an interesting article about the possibilities earlier this year:Global war is probably the least of the concerns. Taking over another 27 million mouths in a what would be a war torn nation and facing economic sanctions by 70% of the UN would probably send them back to their economic situation under Mao.
Then after that you can worry about the logistics about the war itself.
Is China really about to invade Taiwan?
Analysts say US military’s warnings of rising threat reflect deterioration in US-China ties rather than any real change.
www.aljazeera.com