I know there is a ticket machine, but where’s the ticket itself? BTW, I had a concept.

The MTR ticket look like this:

The ticket is used to enter and exit the paid areas of MTR train stations via the turnstile. To obtain it, use the ticket machine and select how many tickets to get (Max of 4 adult tickets and 4 concessionary tickets for each use).

Thank you for your suggestion! I've added your idea to my todo list. Stay tuned for updates!

One more thing: The Octopus card has a variety of colors and don’t forget the first and second generation cards, the tourist Octopus card, and the Octopus add value and enquiries machines.

The First-Generation cards look like this:

The Second-Generation cards look like this:

The tourist Octopus card look like this:

The Add Value Machine look like this:

Smaller version:

Smaller version (Without the roof top thing):

Mostly found in Tuen Ma Line (West Rail Line & Ma On Shan Line) & East Rail Line stations:

The Octopus Enquiries machine is used to check information of the Octopus card. These machines look like this:

Walled version: