China has promised to help resolve the eurozone’s debt crisis, after talks with EU leaders in Beijing.Premier Wen Jiabao offered co-operation to help stabilise debt-ridden EU nations, but made no specific promise to invest in a European bailout fund.EU leaders have been seeking Chinese money to help bolster a planned fund of about 500bn euros ($665bn; £420bn).In another sign of the EU’s troubles, credit-rating agency Moody’s earlier downgraded Spain, Italy and Portugal.Moody’s also downgraded the credit outlook for France, Britain and Austria.The crisis in eurozone counties has intensified in recent days.Greece passed a package of severe cuts late on Sunday, demanded by the EU and IMF in return for a 130bn euro bailout.But the austerity measures have proved deeply unpopular and caused riots in Athens.