It might actually be beneficial for them to let Bitcoin happen...

For one, as I talked about in the following post, the USD is going to implode, and that puts China in a position to become the reserve currency and world leader.  If China does attain that position, world war between China and the US+Japan is inevitable.

https://bitcointalk.org/index.php?topic=496047.msg5462787#msg5462787

Unless they want nuclear war, both China and the US have to adopt Bitcoin.