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Bezos testified alongside Apple’s Tim Cook, Facebook’s Mark Zuckerberg, and Google’s Sundar Pichai in a hearing that marks the end of the House’s investigation into the power these companies wield over the tech industry.

Besides mergers and acquisitions, China has made it clear loss-making "zombie enterprises" in glutted industries that cannot make a turnaround or counteract structural adjustment should be phased out.

Biden, working in his home state of Delaware, has pushed ahead with his transition plans despite the lack of cooperation from the current administration.

Besides hard power, Lei said soft power such as improving product designs and user experiences are equally important, saying "customers now only buy products which they think are good-looking."

Biden has had Secret Service protection since being named the Democratic nominee for the White House, but the normal increase in such protection when a candidate wins the presidential election has not been approved by the GSA.