Just remember, if you are doing the HKG-BKK-SIN run, you need to have different flight numbers on both legs. If you take CX717 you’ll only get 40TP as BA recognises it as one flight rather than two segments. I’ve done this route and only got 40TP for it as a result. If you take CX705 and then switch plane to CX 717, you’ll get the additional 40TP and a trip to a lounge in Bkk