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Bernie Hart (center) teaches tai chi in front of the Salt Lake Police headquarters in Salt Lake City, Utah, on Oct 14. Rick Bowmer / AP
Biden already has the formal support of former President Barack Obama, progressive leaders Bernie Sanders and Elizabeth Warren, and the party's two previous presidential nominees John Kerry and Al Gore.
Besides the ARJ21, aircraft manufacturers including Embraer of Brazil, Bombardier Inc of Canada, and Russia's Sukhoi, are major players in the regional aviation market.
Besides, a joint laboratory of intelligent high-performance computing technology was unveiled during the signing ceremony, witnessed by top officials from Qingdao municipal government.
Better grasp of global audience tastes necessary
