Just trying to understand one thing with coming/going at Changi... You cant enter airside and then leave and then come back? I've never been so just trying to understand the process and how do you they know if you did just leave? I want to be able check out and eat at the QR lounge but with a 715pm flight and the lounge not opening til 6pm I was wondering if I can enter the day/night before, maybe check out Changi and QR lounge then go back to my hotel. I wasnt sure if Covid restrictions no longer a thing if I could do this now?