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"The fact is as plain as day that there is no evidence supporting the claim that the novel coronavirus came from a lab," Zhao said.

With strong scientific and technological innovation capacity, the high-tech zones have shown resilience to risks and registered a higher growth than the national average, Xu said.

Some 428,400 poverty-relief projects in these regions have started operating, and 30,443 poverty-relief workshops have resumed.

Xi said he hoped all non-CPC personages would view the difficulties and challenges in economic development in a comprehensive, dialectical and developmental perspective, focus on the key tasks, give full play to their respective advantages, and properly handle challenges from home and abroad.

Highlighting innovation as the "primary driving force," Xi said China needs scientific and technological solutions, more than ever, to boost economic and social development as well as improve people's living standards.