Participants attend a strategy and policy high-level forum of the Chinese Academy of Sciences (CAS) in Beijing, capital of China, Sept. 12, 2019. (Xinhua/Jin Liwang)

Bai Chunli, president of the Chinese Academy of Sciences (CAS) speaks during a strategy and policy high-level forum of CAS in Beijing, capital of China, Sept. 12, 2019. (Xinhua/Jin Liwang)