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"China's development and progress is a long-term certainty, which offers the most important external environment for foreign businesses to work with China," Wang said.

"China will take the same economic paths as other ... nations, so the growth in energy demand will surely slow as GDP growth rates slow," he said.

"Commodities trade is, by nature, a global business, and trade along the Belt and Road will, in time, grow. That's why we are preparing ourselves early, to make the most of the opportunities," he said.

"Chinese investors have the ability to add value to our economy, create more jobs and boost our export value. They are certainly welcome," he said addressing hundreds of Chinese investors exhibiting in the event.

"Compared to the tests on closed tracks and under the supervision of a backup driver, the driverless road tests on public streets will examine various capabilities of autonomous driving system, especially how the self-driving vehicles deal with emergencies," Jiang said.