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China's President Xi Jinping and Portugal's President Marcelo Rebelo de Sousa (unseen) give a joint statement to the press after their meeting at the Belem Palace in Lisbon, in the first of a 2 days state visit to Portugal, on December 4, 2018. ( Photo by Pedro Fiúza/NurPhoto via Getty Images)

China's President Xi Jinping and Portugal's President Marcelo Rebelo de Sousa (unseen) give a joint statement to the press after their meeting at the Belem Palace in Lisbon, in the first of a 2 days state visit to Portugal, on December 4, 2018. ( Photo by Pedro Fiúza/NurPhoto via Getty Images)