As part of the expansion of the MTR network, there are some retrofitting works going on at Admiralty Station.
Months ago, when the South Island Line started service, I noticed the decor of this flight of stairs.
Yes, that’s a QR code. That is a not attached to the wall, it is a mosaic wall.
I can’t help but wonder if that QR code will age as well as this, in another corridor, a few metres away