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Seattle • Chinese President Xi Jinping addressed Amazon.com founder Jeff Bezos, billionaire investor Warren Buffett and other top American and Chinese business leaders Wednesday, vowing that his country would work to remove barriers to foreign investment and improve intellectual-property protections.

Xi's conference with the business leaders in Seattle was part of a busy day. He also toured the Boeing production facility in Everett, the sprawling suburban Microsoft campus and visited a high school in Tacoma, where he received a football and a personalized jersey.

Protesters and supporters of Xi holding signs in English and Chinese lined the streets outside Microsoft's Redmond campus and also waited outside the high school.

Apple CEO Tim Cook, Microsoft CEO Satya Nadella and Jack Ma of Chinese e-commerce giant Alibaba also were among the 30 executives who attended a closed-door discussion moderated by former U.S. Treasury Secretary Henry Paulson.

Xi also said China and the U.S. could work together to address cybercrimes, a problem that has sparked mutual tension. He said China was a staunch defender of cybersecurity and also had been a victim of hacking. American officials say hacking attacks originating from China are approaching epidemic levels.

Though he acknowledged difficulties as China shifts its economy from one driven by exports to one driven by a growing middle class, Xi told the group China's economy will maintain a "steady medium and high speed of growth for a long time."

"China will open up still wider to the outside world," Xi said through an interpreter. "Without reform, there will be no driving force; without opening up, there will be no progress. ... There is good news, and I believe there will be more good news in the future."

China will "stand firm" to protect intellectual-property rights, he added.

Xi attributed the Chinese economy's recent slowdown to three factors: world economic problems, proactive Chinese efforts at regulation and "protracted structural problems" in China.

A big item of concern for the American CEOs is a treaty that would provide a framework for broader investment in the economy of each nation.

All of the American CEOs participating in the forum signed a letter to Xi and President Barack Obama urging them to support such a treaty.

Bilateral investment treaties provide rules for companies doing business in other countries. The agreements can help ensure the rights of foreign investors are protected and that foreign companies operate on a level playing field with domestic ones.

An agreement with China could open up more of that nation's massive market to U.S. companies, provide clearer rules for Chinese investment in the U.S. and create jobs in both countries, supporters say.

Representatives from Twitter, Facebook and Google were notably missing from the event. China blocks those companies' websites.