Oh it's you again!

Seriously, dude, 70% of the hashpower of the whole network doesn't necessarily mean that all of those miners are Chinese; other miners from other parts of the world could just connect to those pools and work under it to get some stable or increased profit (?).
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They will never allow the protocol to change to accept larger blocks since it's not in their interest.
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This is a bold statement. Where'd you get this information?