I ended up flying home on schedule...they did have to denied boarding to 4 passenger on that flight due to overbooking...but the gate agent inform me that they start bumping passenger off in Y class instead of J class...compensation was told to be a free roundtrip between HKG and Canada in "E" class...I remember up until last year when CP overbook flights, a message will be displayed at check in as "Denied boarding for free ticket"...however, not anymore.
Regards,
Empress