This was brought to my attention over on KFF, Lau Kar-leung credited as a zombie in the 2014 film Zombie Fight Club.
https://hkmdb.com/db/movies/view.mhtml?id=17109&display_set=eng
This film was released a year after Lau's passing. Obviously there's the possibility that he filmed a cameo before his death, I find it highly unlikely in this situation and believe this is more likely to be another actor with the same name. Any thoughts on this?

I was signed in to do some prep for my upcoming KUPs, so decided to create a new person for this role as I'm 99% sure that it's not "Pops". If anyone has evidence to the contrary please let us know.

Lau Kar-leung (2)
https://hkmdb.com/db/people/view.mhtml?id=137655&display_set=eng