Originally Posted by
exerda
They do the same at HKG. If you're flying UA, they do a bag check at the gate. Really annoying that they enforce a "liquids ban" on those flights for stuff which is airside.
TPE is relatively new IIRC; one of my employees goes to TPE 1-2x a year and brought stuff back from airport duty free back in February.
For HKG, it's for all US-bound flights, not just UA flights. I had a bottled water purchased at the airport taken away from me on a CX flight.