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"Currently, our President Muhammadu Buhari is also the chairman of the Economic Community of West African States," Jidda said.

"China's further opening-up will bring more development opportunities to multinational companies. Our development will be more diversified," he added.

"Chinese consumers are not very worried by the Trump tariff tantrum because this is the eighth consecutive year in which the (tertiary) services and consumption sector is the largest part of the GDP," he said.

"China's automotive industry has basically returned to normal," said Chen Shihua, a deputy secretary-general of the organization.

"Chinese investment does have the potential to address Africa's infrastructure gap, but its approach has led to mounting debt and few, if any, jobs in most countries," he said before leaving for a five-nation trip that includes Chad, Djibouti, Ethiopia, Kenya and Nigeria.