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As for external challenges, major risks might emerge from policy changes in developed countries, such as the United States, according to Su Jian, an economics professor at Peking University.

As a border city, Lincang is challenged by the influx of drugs from the Golden Triangle－Thailand, Laos and Myanmar－that pass through the city into China.

As countries are seeking ways to revitalize their economies to mitigate the impact caused by the COVID-19 pandemic and weak goods demand, he said US unilateral action will damage the hard-fought results aimed at de-escalating tensions and bilateral trade disputes. It could escalate the risks of a new round of tariffs.

As a key step in poverty relief, around 2,348 people in Anlong county, Southwest China's Guizhou province, were relocated to 476 new households from September to November.

As a post-doctoral researcher from the Institute of Atmospheric Sciences at Fudan University, Zhang Peng, 33, knows the value of such balloons.