tl;dr: A cheap AliExpress "7-port USB 3.0 hub" turned out to be a fake: only one port has actual USB 3.0 pins (wired straight through as a pass-through), while the other six are USB 2.0 sharing bandwidth via two cascaded HS8836A single-TT hub chips. The teardown also revealed skipped shell soldering, missing bypass capacitors, no per-port power protection, and a barrel jack wired to backfeed the host — making it both flimsy and potentially dangerous to connected devices.