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"Cuban educational professionals answer the students' questions live and in a quick manner. Through this new technology we are expanding the educational spectrum in the country," said Rolando Forneiro, Cuban deputy minister of education.

"China's economic development is in a strategically important period, and the prospects for the futures market is very promising," Fang said.

"China should drive the need rather than being a follower," he said.

"Countries involved in the Belt and Road Initiative are intensifying their infrastructure building and require large amounts of steel products, which can be met by Chinese steel producers," said Wang Guoqing, research director at the Lange Steel Information Research Center.

"Compared with the traditional way of preventing thrown objects from heights, such as installing protective nets and posting warnings, I think that installing cameras has turned out to be more effective," she said.