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Newly-elected academician of the Chinese Academy of Sciences (CAS) Duan Guangren speaks during a symposium in Beijing, capital of China, Nov. 22, 2019. (Xinhua/Cai Yang)
Newly-elected academician of the Chinese Academy of Sciences (CAS) Duan Guangren speaks during a symposium in Beijing, capital of China, Nov. 22, 2019. (Xinhua/Cai Yang)