Visitors participate in an experiment at a lab of the Institute of Physics in the Chinese Academy of Sciences (CAS) in Beijing, capital of China, May 19, 2018. The 14th CAS "Public Science Day" kicked off on Saturday. (Xinhua/Jin Liwang)
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Visitors participate in an experiment at a lab of the Institute of Physics in the Chinese Academy of Sciences (CAS) in Beijing, capital of China, May 19, 2018. The 14th CAS "Public Science Day" kicked off on Saturday. (Xinhua/Jin Liwang)
