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Approved by the State Council, the 23-clause rules aim to effectively forestall and resolve national security risks while actively promoting and protecting foreign investment to support the country's higher-level opening-up and facilitate the new development paradigm, said a statement released by the two government departments.

Around 70 percent of the city's groundwater is contaminated by waste and chemicals from leaky household septic tanks and industrial plants that can cause diarrhea or other illnesses if the water is not boiled or purified properly.

Artificial intelligence has played a "major and unique" role in tackling the COVID-19 outbreak in China, ranging from patient tracking to logistical support to traffic management, a senior science official said on the weekend.

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Around the world, air pollution has plummeted to levels not seen in decades-thanks to the lockdowns globally that have closed borders and brought transportation and tourism to a grinding halt.