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"Economic and trade cooperation has always been an important pillar of BRICS relations. We are committed to strengthening economic integration in the area," he told a news conference.

"Doing many different things gave me the opportunity to see how society really works. The perspective on life that formal education provides is far too limited."

"Data has become a new factor of production, but exploration of data value by human beings is still confined to a few service industries such as finance and retail. We have just started in the fields of agriculture and industry, and have a long way to go," Chen said at the ongoing Boao Forum for Asia, in Boao, Hainan province.

"Each time I go, I take as much with me as possible, as it's difficult to buy things there," she said.

"Dust is most likely the reason why the star's light appears to dim and brighten," said lead author Tabetha Boyajian, assistant professor of physics and astronomy at Louisiana State University, for whom "Tabby's Star" is nicknamed.