As the world's largest developing country and the largest developed country, China and the United States now have a broader basis for cooperation in promoting world economic growth, maintaining world peace and stability, and advancing sustainable global development, Chinese President Hu Jintao said?in Chicago?Thursday.

The two nations also shoulder more important common responsibilities on those issues, he said in a speech delivered at a welcoming dinner hosted by Chicago Mayor Richard Daley.

Mutually beneficial economic cooperation provides indispensable and strong support for building Sino-U.S. cooprative partnership, and the U.S. Midwest region's sustainable and fast-growing exchange and cooperation with China in the recent years served as a vivid example for the development of the bilateral relations, President Hu said.