In China the number 8 means wealth or fortune. It's not a coincidence that Brooklyn Chinatown is on 8th Ave. Their 'numerology' is interesting
To add a complication, Chinese tends to use the US convention (with the ground floor being floor 1), while the English convention is the British one (with the ground floor being floor 0).
By happy coincidence, then, the 13th floor is also 十四樓, ie the 14th floor, so you only need to skip one floor, rather than two. That explains why HK skyscrapers are so high.