Scratch the surface of Stephen Harper's G20 agenda and you'll find China.

Instead of the once all-important United States, China will, more than anything, determine whether the Prime Minister can claim success at the global gathering in June.

Mr. Harper is looking to harness China's increasing clout in opposition to a global bank tax that's supported by many of Canada's wealthy allies. But he's also pressing China to boost the world economy with spending, or by revaluing its currency, while Western nations tame debts.

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