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The conference is expected to reach rich and concrete results, such as a series of bilateral and multi-lateral initiatives and agreements, and the results of projects and research will also be announced during the conference, Xu said at the press conference.

When the asteroid samples are returned, scientists will conduct lab analysis on its physical properties, chemical and mineral components, isotopic composition, structure and age.

The report highlighted trade tensions as one of the key sources of downside risk to the global outlook, noting that raising tariffs would lead to higher prices for consumers, and trade policy uncertainty would reduce business investment, disrupt supply chains, and dampen productivity growth.

There was a huge infrastructure demand in Asia and Europe, and it was a good thing for China to play a leading role in building infrastructure in the region, he noted.

By 2018, China had 249 million people aged 60 and above, accounting for 17.9 percent of its total population, becoming a country with the largest and fastest-growing aged population in the world.