They are also free of heavy metal elements and toxic gases at high temperatures.
They began demining in several small areas this month and will build roads to facilitate a pilot project slated for April to excavate remains of soldiers missing from the 1950-53 Korean War.
They are all automated with just one member of staff packing shelves. In-store cameras keep an eye on shoppers, while big data analysis highlights what products are hot and what are not among customers.
They have engaged in cooperation in high-level exchanges, real-combat training and military competitions, and had sound interaction and collaboration on international multilateral occasions, the ministry's spokesman Wu Qian said at a press conference.
They reasoned that enhanced political engagement would surely mean an injection of Chinese money into the Polish economy. To an extent, this has been the case: in 2014, Chinese funding accounted for 0.25 percent of total foreign investment in Poland, and last year, it rose to 1.2 percent.
They told Xi that their countries attach high importance to ties with China, cherish the friendship between the peoples, and are willing to participate in the Belt and Road Initiative to deepen mutually beneficial cooperation.
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They can learn the latest traffic rules and how to apply for a driver's license at the traffic police service station. They can also use a simulator to refresh their experience of driving, which they may have forgotten while in prison.
They boasted total investable assets worth 61 trillion yuan, registering a compound annual growth rate of 12 percent.
They said China opposed the US' bullying for concessions, and it will not, and indeed cannot, yield.
They expected China's central bank to remain prudent and focus on the domestic situation in repairing the economic damage from COVID-19, helping to anchor investor confidence.