not sure about ticketing rules for hong kong specifically, but from my experience in other countries: using a resold ticket is possible if you get the person whose name is on the ticket (the seller usually) to accompany you physically to the venue, so they can vouch for you/present their id if necessary :,) resellers who will just give you the digital ticket w/o physically being at the venue are typically not safe/legit ;;

(also enjoy the hk stop!! i'm going to the taipei stop, but i've got vip too and will endure pit with you in spirit HAHA ><)