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The United States, Britain, France, Germany, Russia and China began a final round of talks, looking to seal a deal with Iran, under which Iran will limit its nuclear capability¹ in exchange for an easing of international economic sanctions on the country. China's ambassador to the International Atomic Energy Agency said gaps remain in defining the scale of Iran's uranium enrichment.

"We've been in close contact with the US, Iran as well as Russia and other world powers. Many issues such as gas is also on the table and being discussed throughout the negotiation². The aim for us is to facilitate each party to reach a concensus as much as possible, and China is playing a constructive³ role in pushing the talks forward," says Cheng Jingye, Chinese ambassador to International Atomic Energy Agency.