In fact, it should be clear which department and which subject it is, but it doesn't matter. I recommend you to go to the research learning network, which is an old website for n years. Beihang University has a special section, and these video online courses are all complete. It depends on which subject and major you are taking. You studied in it for about half a year before, and I think it saves a lot of things and helps a lot!

In terms of problem expansion:

Beihang University was founded in 1952 as Beijing Institute of Aeronautics and Astronautics, which was formed by the merger of Tsinghua University, Beiyang University, Xiamen University, Sichuan University and Chongqing University.

1959 was designated as a national key university by the state, and was renamed Beijing University of Aeronautics and Astronautics 1988 in April.

As of August, 2020, Xueyuan Road and Shahe Campus of the school cover a total area of more than 3,000 mu, with a total construction area of 1.7 million square meters. The school has 35 secondary colleges; At present, there are 23 post-doctoral research stations, 25 first-level disciplines authorized by doctoral degrees, 39 first-level disciplines authorized by master's degrees and 74 undergraduate majors. There are 8 first-class disciplines and 28 national key disciplines in two disciplines. There are 4,266 faculty members and more than 37,000 full-time students.