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Developed nations still have much to do in their pledges to provide money and transfer low-carbon and environmental friendly technologies to developing countries, Xie said.

"China firmly opposes all forms of terrorism and resolutely cracks down on any violent and terrorist crime that challenges the bottom line of human civilization. To achieve this goal, China is willing to cooperate and coordinate with the international community," Huang said.

"Why are we in there trying to throw inflammatory elements by ourselves painting China as some kind of an expanding, menacing power? It just generates all of the wrong signals to other Asian countries," said Bruce Fein, a Washington D.C.-based attorney, consultant and author, in an interview with Xinhua over the weekend.

When asked whether China will take further measures or make compromises to deliver fruitful achievements at the conference, Xie said China will ensure that the INDC targets will be accomplished in whatever circumstances.

Both presidents made clear the correct direction of development of bilateral ties and reached a series of agreements during the visit, sending a positive signal to the outside world that China and the United States are committed to dialogue and cooperation, Zhang said.