Obama said the two leaders are discussing holding a global nuclear summit next year.

CNN: Obama moves to bolster U.S.-Russia ties

But China's Assistant Foreign Minister Ma Zhaoxu told the same briefing that the issue of North Korea and its satellite launch wouldn't be on the agenda at the global nuclear-security summit in Seoul next week.

WSJ: China Seeks Peacemaker Role on North Korea

And we should start by having a global summit on nuclear security that the United States will host within the next year.

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Other issues expected on the summit agenda included global warming, security and Iran's nuclear programme.

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