also, fwiw...

china doesn't really have a reason to attack japan or korea or taiwan, other than for defensive reasons. and, the expansion to the southeast is likewise purely defensive.

while the island chains to the south should have long term security concerns, the only country that should be seriously concerned about real chinese aggression is myanmar. if the chinese are going to go in anywhere, that's where they're going to go in. it would solve almost all of their problems....