【正文】 itical responsibilitiesbut china does not just have new economic power.it has new political power.and that brings new political responsibilities too.what china says – and what china does – really matters.there is barely a global issue that needs resolution, which does not beg the questions: what does china think, and how can china contribute to a solution?china has attempted to avoid entanglement in global affairs in the past. but china’s size and global reach means that this is no longer a realistic choice.whether it’s climate change or development, health and cation or global security, china is too big and too important now not to play its part.on climate change, an international deal has to be fair.and that means that countries with different histories can’t all be expected to contribute in exactly the same way.but a fair deal also means that all countries contributeand all are part of an agreement.and there’s actually a huge opportunity here for china.because china can really profit from having some of the most efficient green energy in the world.on international security, great powers have a bigger interest than anyone in preserving stability.take development for example, china is one of the fastest growing investors in africawith a vital influence over whether africa can bee a new source of growth for the world economy.we want to work together to ensure that the money we spend in africa is not supporting corrupt and intolerant regimes.and the meeting of the un security council which the british foreign secretary will chair later this month provides a good opportunity to step up our cooperation on sudan.as china’s star rises again in the world, so does its stake in a stable and ordered world, in which trade flows freely.today, china is the world’s second biggest importer of oil, and sudan is one of your most important suppliers.so china has a direct national interest in working for stability in sudan.and four fifths of your oil imports pass through the malacca straits.so like britain and the other big trading nations, you depend on open sea lanes.and like us, your stability and prosperity depends in part on the stability and prosperity of others.whether it’s nuclear proliferation, a global economic crisis or the rise of international terrorism, today’s threats to our security do not respect geographical boundaries.the proliferation of nuclear material endangers lives in nanjing as well as new york.china is playing an active role in helping to prevent conflagration over north korea.we have been working with china in the un security council to keep up the pressure on iranand china’s continuing role here is vital if we are to prevent iran from acquiring a nuclear weapon.in your own region, i believe china can work with us to improve the situation for the burmese people.and china is one of the few countries that burma will listen to on this point.but political responsibilities are not just about how one country interacts with anotherthose responsibilities also apply to the way a country empowers its own people.political perspectivesit is undeniable that greater economic freedom has contributed to china’s growing economic strength.as china’s economy generates higher living standards and more choice for chinese people, there is inevitably debate within china about the relationship between greater economic freedom and greater political freedom.i recognise that we approach these issues with different perspectives. i understand too that being in government is a huge challenge.i’m finding that running a country of 60 million people.so i can only begin to imagine what it is like leading a country of billion.i realise this presents challenges of a different order of magnitude.when i came here last i was britain’s leader of the opposition.now we’ve had a general election.it produced a coalition government, which bines two different political parties – the conservatives and the liberal democrats – with different histories and political philosophies, working together for the good of our country.the labour party is now the official opposition, with a constitutional duty to hold the new government publicly to account.indeed if i were not in beijing this wednesday afternoon, i would be preparing for my weekly session of prime minister’s questions in the house of mons, w