What do I do with the mechanical pig?
The answer can be found here: http://steamcommunity.com/app/250260/discussions/0/540732889243732067/
Go to the front of the hotel, you can place the pig on a spit.
You need to go to the sign that says "Kai Tak Hotel." Near the clam there is a fire where you need to cook the pig.
Put it on the spit also the QR code doesn't say how or what you need to do its actually:
Synthetic_even_toed_ungulate_and_neural_terminus_catalyst//DO_NOT_COOK_OR_CONSUME.(c)1958c_S WINOLUXE