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China has always adhered to the principles of non conflict, non confrontation, mutual respect, and win-win cooperation in China-U.S. relations, he said.

Nowadays, some people still see his or her nation as superior and as having to come first, which will surely result in tensions and conflicts, Polakul said.

"If we do not embark on sustainable development, if we do not try to save countries with a low standard of living through sustainable investment, if we don't do these things well, climate change will make sure that the temperature would rise above two degrees and that our planet may basically not survive," Gramegna warned.

On Monday morning, prior to the dialogue, Hu and Hammond attended the launch ceremony of the Shanghai-London Stock Connect, under which Shanghai-listed companies can list on the London Stock Exchange via Global Depositary Receipts (GDRs) issuance, while British companies can issue China Depositary Receipts (CDRs) on the Shanghai Stock Exchange.

China appreciates these countries' objectivity and fairness, Foreign Ministry Spokesperson Geng Shuang said at a press briefing.