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4. Deepening economic cooperation and trade

China's President Xi Jinping delivers a speech during his visit to the commercial airplane factory of Boeing Co. in Seattle, the United States on Sept. 23, 2015. (Photo/Xinhua)

The leaders reaffirm that the negotiation of a high standard bilateral investment treaty (BIT) is a top economic priority.

The United States commits itself to maintaining an open investment environment for Chinese investors, including state-owned enterprises, as with investors from other countries.

Chinese companies have agreed to buy 300 jets from Boeing.

A consortium of Chinese rail firms has teamed up with private U.S. company XpressWest to build a high-speed rail line in western America. It will be America's first high-speed railway project.