That's apparently a patent for a variable-sweep wing carrier-based aircraft (变后掠翼舰载机) design, or so it reads, assigned to Northwestern Polytechnical University (西北工业大学), which is no ordinary school.
They've done a significant amount of work for the Chinese military-industrial complex over the decades, on top of the human capital they've trained and contributed.
For example, the good folks at 西北工业大学 — or more precisely, a subordinate institute, laboratory and/or subsidiary — were responsible for designing and engineering the ASN-301 loitering munition:
The networks of 西北工业大学 have , which should tell you that some of their aviation projects don't exactly exist to train undergrads, but principally to yield deliverables that'll shape and impact the battlefield.
