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China became the world's largest market for industrial robots in 2013, surpassing Japan, according to the International Federation of Robotics. Last year, sales of robots used in assembly lines exceeded 140,000 units in the country, up 58 percent year-on-year.

China had more than 230 million people aged 60 or above at the end of 2016, 16.7 percent of the total population, according to the Ministry of Civil Affairs. The country's elderly will account for about one-quarter of the population by 2030.

China has greenlighted the export of second-hand vehicles. As a result, nine cars were loaded onto a cargo ship in Nansha port in South China's Guangdong province last week, ready to sail to Cambodia. It took only three minutes for customs in Nansha to successfully clear the vehicles.

China has filed a request for negotiation on the compensation to the US, which is in accordance with the WTO rules. But the US has yet to respond, said the official.

China has no intention of colonizing Africa, nor does it intend to trap the continent into debt, according to African experts attending a seminar in Nairobi, Kenya.