If you are travelling through Hong Kong and have purchased Duty Free Alcohol in another country, this can be confiscated.
Three different Australian groups had their wine and spirits confiscated because it was not in a sealed bag.
Duty Free Australia had told them is was OK, to carry wine and spirits and it was as far as HK. However when they left the transit lounge to board their next flight it was confiscated because it was not in a sealed bag.
There was an old regulation that no more than 500mls could be hand carried through HK onto a plane,, however all was taken and the reason given was it must be in a sealed bag.
If this happens to you, keep your docket, ask for a copy of the surrender document and take it back to the Duty Free shop in Australia..