Originally Posted by flyinglan

I had a recent experience of 9 hours overnight layover at HKIA with seperate PNRs on CX.
I arrived around 10 pm, used the lounge invitation I received at KUL to enter the lounge. The gate agent took my invitation card and asked where I came from, I told him from the KUL flight. I was not asked to scan the HK healthcode, actually I didn't have it.
Spent the night in the airside, yes, the Decathlon sleeping bag and inflatable pillow works like charm.
The following morning, I went to the lounge again (6am) with my boarding pass for the next flight. Agent scanned it and let me in.
It could be the timing of my second flight the agent didn't ask for further proof that I stayed in transit area the whole time. If you could demostrate less than 24 hours connection (boarding pass), I think you will be fine not needing to scan the HK healthcode app.