China and the EU also stressed that it is crucial to step up actions on climate change from now till 2020, reiterating developed countries' commitment to jointly mobilize 100 billion U.S. dollars annually by 2020 to address the needs of developing countries.

Actually, China has already made enormous efforts to address climate change.

A special report recently published by the International Energy Agency showed Chinese carbon emissions registered in 2014 a drop of around 130 million metric tons, or 1.5 percent annually. It was the first time that the volume of Chinese carbon emissions declined since 1999, while its economy increased around 7 percent.

Besides cooperation with Europe, China, as a responsible major country, has also pledged to help other developing countries cope with climate change through cooperating with the UN and multilateral financial institutions, establishing a South-South Cooperation Fund and enhancing professional training and exchanges.

Since 2011, China has accumulatively invested around 44 million U.S. dollars in South-South cooperation and provided assistance to other developing countries through low-carbon products, training and capacity building.

China's efforts in addressing climate change have got positive feedback from the international community. French Prime Minister Manuel Valls said that "China has a key role to play and has already made important decisions concerning environmental matters."