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As part of the pilot program, Ehang will help the local government set up a command-and-control center to ensure that multiple AAVs flying simultaneously can remain safe yet efficient. It will also help the city build the basic infrastructure to support urban air mobility, including by designing safety rules and market entry thresholds.

As many Chinese companies cast off their heavy dependence on service trade with the US and conduct more international collaboration in research and development with other countries including Germany, Russia and South Korea, Yu said it would be beneficial for China and Germany to deepen cooperation in the field of service trade.

As of June last year, there were 3,400 protectors like Liu scattered across 404 counties along the 21,000 km of the Great Wall, according to the State Administration of Cultural Heritage.

As in previous years, Tuesday's document again stressed sufficient supply of farm produce, which is critical for a nation with the world's largest population and upgrading food demand.

As of 10:00 pm local time Monday (1300 GMT), 550,000 households across Japan were still without power, including some 278,000 households in the Shizuoka prefecture near Tokyo, for which it might take several days to restore power.