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Noting that China boasts a great number of scientific professionals and hefty R&D spending, Xi stressed improving the ecosystem for sci-tech innovation and building platforms for scientists and scientific professionals to put their talent to good use, so as to make sci-tech innovations mushroom in a steady flow.

"Driven by selfish motives, a small number of U.S. politicians have been instigating anti-China sentiments, antagonism and confrontation. Such retrogressive moves, unpopular as they are, have been and will continue to be strongly criticized and rejected by visionary people in China and the U.S., as well as peace-loving people all over the world," Zhao said.

Xi chaired the symposium to solicit opinions on China's scientific and technological development for the 14th Five-Year Plan (2021-2025).

Some U.S. politicians have put their selfish interests above market principles and international rules to jeopardize the global internet, said Zhao, adding that such an attempt has already been seen through by the international community.

He has repeatedly stressed that without good health for all, there would be no moderately prosperous society in all respects.