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Chen Yidan, founder of Yidan Prize, speaks during the opening ceremony of 2019 Yidan Prize Conference Series: The Americas, at Northwestern University in Evanston, Illinois, the United States, on May 23, 2019. (Xinhua/Wang Ping)
Chen Yidan, founder of Yidan Prize, speaks during the opening ceremony of 2019 Yidan Prize Conference Series: The Americas, at Northwestern University in Evanston, Illinois, the United States, on May 23, 2019. (Xinhua/Wang Ping)