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Facts have shown that the interests of China and the U.S. have grown increasingly intertwined. The growth of China-U.S. relationship has not only benefited the two peoples, but also enhanced peace, stability, and development in the Asia-Pacific and beyond.

Echoing the queen, Xi said China and Britain, with their outstanding civilizations, have been influencing each other for centuries though far away from each other geographically.

With Artemisinin, Africa has changed for the better and has been put in a better position to achieve the UN Milllenium Development Goals, Moete said.

Obama said the United States and China shared common interests on many issues and have made important progress in cooperation in many areas.

"Today, more than at any time before, countries need to negotiate. Problems are not limited within borders, and challenges cannot be handled by any country alone," the president said at the meeting.