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"China plays a significant role in the peace and security architecture of the United Nations, not only as a permanent member of the Security Council, but also as a significant financial as well as police and troop contributor to UN peacekeeping," said Alexander Zuev, assistant secretary-general for rule of law and security institutions in the UN's Department of Peacekeeping Operations, or DPKO.

"China always looks ahead to the next stage, and that, I think, is even more important now than it ever was," said Nicholas Stern, chair of the Grantham Research Institute on Climate Change and the Environment at the London School of Economics and Political Science.

"Children are particularly vulnerable to the health risks of a changing climate. Their bodies and immune systems are still developing, leaving them more susceptible to disease and environmental pollutants," said Nick Watts, who co-led the study.

"China is leading a trend in the rise of mobile commerce and alterative payments, like e-wallets, both in-store and online," Shi said.

"China is good at scaling up the innovation that will have global impact. Whenever there's a new technology or a new industry, China is a good place to scale it up," he said.