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His words came in as China celebrated the 30th anniversary of its postdoctoral system, which has covered all disciplines and major fields of economic and social development.
Xi, who proposed the upgrade Friday in a keynote speech at the opening ceremony of the second summit of the Forum on China-Africa Cooperation (FOCAC), made the announcement before the landmark two-day gathering comes to an end.
The G20 is a main forum for global economic and financial cooperation that brings together the world's major advanced and emerging economies, which represent around 85 percent of global GDP, 80 percent of world trade, and two-thirds of the world population.
The United States is willing to work with China closely to ensure the success of the meeting, Obama told Xi on the sidelines of the Antalya summit.
The president is also expected to introduce the progress made in implementing the China-proposed Belt and Road Initiative and the opportunities the proposal brings to the region and the world.
来源：资阳报