Hello FT! I got a good amount of points in my Aeroplan and I'm planning to use my points to travel from YYZ going to MNL in class J. I plan to use my points for one way and cash going back. However I couldn't get good deals from Aeroplan if I search for YYZ-MNL. What works for me however is the following itinerary:

YYZ - HKG (Class J) to be purchased completely with points as one way. I plan to stay in HKG for 3-4 days.
HKG - MNL (Economy) cash and booked as round trip
HKG - YYZ to be purchased with cash as one way

My concern is will I be questioned in immigration, particularly in HKG, if they see that I'm only booked one way and I'm going to be staying in HKG for 3 days?

Thanks!