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Both the absolute number and the relative proportion of the working-age population－those 16 to 59 years of age－have been dropping. Last year there were 897 million people in China in that age group, down by 26 million from the peak in 2011.

Brazil would like to take more measures to facilitate people-to-people exchanges with China, the Brazilian president added.

Building of the infrastructure for Beijing Daxing International Airport, which started in 2014, was completed on Sunday, marking the start of the preparatory stage of the airport's operation, according to the airport authorities.

Both the US and China are major trading partners with the ROK, Asia's fourth-largest economy. In March, the ROK signed a deal with the US to revise their bilateral trade agreement, and it has been exempted from the global steel tariffs imposed by the Trump administration, Instead, the ROK's exports of steel to the US have been cut by 30 percent.

Braasch said the type of radar technology being developed by Echodyne, plus laser-based?sensors under development at Velodyne and many other companies, should solve the sense-and-avoid problem within the next few years.But uUntil then, drone deliveries in the United States are likely to be restricted to closely watched experiments like Project Wing’s burrito run.