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Sierra Leone's President Julius Maada Bio (L) shakes hands with China's President Xi Jinping during the Forum on China-Africa Cooperation at the Great Hall of the People in Beijing on September 3, 2018. - President Xi Jinping told African leaders on September 3 that China's investments on the continent have "no political strings attached", pledging $60 billion in new development financing, even as Beijing is increasingly criticised over its debt-heavy projects abroad. (Photo by Andy Wong / POOL / AFP) (Photo credit should read ANDY WONG/AFP/Getty Images)

Sierra Leone's President Julius Maada Bio (L) shakes hands with China's President Xi Jinping during the Forum on China-Africa Cooperation at the Great Hall of the People in Beijing on September 3, 2018. - President Xi Jinping told African leaders on September 3 that China's investments on the continent have "no political strings attached", pledging $60 billion in new development financing, even as Beijing is increasingly criticised over its debt-heavy projects abroad. (Photo by Andy Wong / POOL / AFP)        (Photo credit should read ANDY WONG/AFP/Getty Images)