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Before he began posting the videos in 2017, Li was already trying to find creative ways of taking study beyond the classroom and textbooks.

Beihang University, previously known as Beijing University of Aeronautics and Astronautics, has already established an unmanned aircraft systems and engineering department, with an emphasis on scientific research and management.

Beginning Saturday morning, 2,605 Beijing hospitals switched to the new system, as released by the Beijing health authority.

Beijing Meteorological Service issued on Monday a new yellow alert — the second-lowest level in a four-tier warning system — for rainfall and the lowest alert for flooding.

Beijing Daxing International Airport went into operation on Sept. 25, 2019. It is expected to realize a passenger throughput of more than 100 million a year in the future.