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BEIJING, Nov. 17 (Xinhua) -- Chinese President Hu Jintao met here with visiting U.S. President Barack Obama on Tuesday. Both leaders agreed to start cooperation in new fields of space exploration and high-speed railway construction.     Hu said both leaders agreed to deepen cooperation between China and the United States on the basis of mutual benefits in areas such as anti-terrorism, law enforcement, science and technology, agriculture, health care and civil aviation.     The two leaders also initiated to start cooperation in new areas like space exploration and high-speed railway infrastructure construction, and keep promoting greater development in military relations.     Obama and Hu also discussed to expand cultural exchanges between the two nations, especially youth exchanges, and supported both sides to set up a cultural exchange mechanism and to strengthen cooperation on dispatching more students to each other countries.     Obama is paying a four-day visit to China, his maiden trip to China since taking office in January.

BEIJING, Nov. 27 (Xinhua) -- Days after the United States announced to cut its carbon dioxide emissions by 17 percent from 2005 levels by 2020, China promised to slice carbon intensity in 2020 by 40 to 45 percent compared with 2005 levels.     The respective policy movements of both China and the U.S., the biggest two emitters in the world, won global attention, if not instant applause. The early signs of the concerted efforts could be sensed after the two countries, the biggest developed and developing economies, released a joint statement on Nov. 17 during U.S. President Barack Obama's first China visit.     The two sides, according to the joint statement, had a "constructive and fruitful dialogue" on the issue of climate change.     It also said that the two sides were determined, in accordance with their respective national conditions, to take important mitigation actions.     The policy announcements from the two countries came just as the international community was worried about a possible stalemate at the United Nations Climate Change Conference in December in Copenhagen, Denmark.     Although not required by the United Nations Framework Convention on Climate Change (UNFCCC) and the Kyoto Protocol for quantitative greenhouse gases (GHGs) emissions cut, China, defined by the United Nations as a developing country, still puts a drastic slash of its GHGs emissions in the coming ten years, even at cost of lowering its own economic development speed.     Economists estimated that China might double its current gross domestic product (GDP) by 2020. A 45-percent reduction of carbon emissions per unit of GDP means China would emit slightly more carbon dioxide than current levels.     At the same time, the Chinese government voluntarily set "the binding goal," which is to be incorporated into China's mid- and long-term national social and economic development plans.     It's much more than a developing nation is expected to offer, out of responsibility of and sincerity to addressing the common challenge faced by the international community.     Held by the UNFCCC accountable for contributing most of the total global carbon dioxide emissions, which were assumed to warm the planet and consequently result in natural disasters, many industrialized countries dodged their responsibilities of cutting emissions to levels that meet requirements of the Kyoto Protocol and the Bali Roadmap.     The United States, in spite of announcing a meaningful emissions cut of 17 percent, still lags far behind what the UNFCCC requires developed countries to behave.     In the Sino-U.S. joint statement, the two sides were committed to reach a legal agreement at the Copenhagen conference, which includes emissions reduction targets of developed countries and appropriate mitigation actions of developing countries on the basis of the principle of common but differentiated responsibilities and respective capabilities.     The U.S. and China also agreed substantial financial assistance to developing countries on technology development, promotion and transfer, which was largely invalid in the past years.     As China takes the lead to exemplify how a developing country, with the world's biggest population, could do to a better future of the world, it is now the developed world's turn to show their sincere care for a greener Earth.

BEIJING, Nov. 17 (Xinhua) -- Chinese President Hu Jintao said here on Tuesday that the key to Sino-U.S. relations was to mutually respect and accomodate each other's core interests and major concerns while differences from different national conditions were normal.     "The China-U.S. relations are very important. Maintaining and promoting such ties is a shared responsibility of both sides," Hu told reporters here after meeting visiting U.S. President Barack Obama.     China is ready to work together with the United States to push forward the continuous, healthy and stable development of Sino-U.S. relations to better serve the interests of the two peoples and the people around the world, said the Chinese leader.     Hu said that the two sides have reaffirmed the "cardinal principle" of "mutually respecting national sovereignty and territorial integrity" and voiced opposition to any attempt by any force that violates this principle.     He said that China appreciates President Obama's support for the one-China policy and the three Sino-U.S. joint communiques, and his respect for China's national sovereignty and territorial integrity on the Taiwan issue and other matters.     "We have both agreed to conduct dialogues and exchanges on issues including human rights and religion, in the spirit of equality, mutual respect and non-interference in each other's internal affairs, so as to boost understanding, mitigate differences and broaden consensus," Hu said.