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History does not lack crucial moments that call for responsible action from the world's major countries.

Warning of barriers and risks ahead as well as profound changes in Chinese society and abroad, Xi noted that requirements for Party's governance and leadership have changed and leading officials should have a stronger sense of urgency and be ready for "a great struggle with many new contemporary features."

The U.S.-China economic relationship supports roughly 2.6 million jobs in the United States across a range of industries, among which about 104,000 jobs are created by Chinese investment, a study conducted by Oxford Economics and the U.S.-China Business Council showed.

To do so, efforts must be made to combine the central government's overall jurisdiction over the Hong Kong SAR and the high degree of autonomy of the region, he said.

It is in the interest of the international community that China and the United States jointly address global challenges.