Hk China means Chinese HK. It does not mean Hk and China at the same. If you read HK China as 2 places, then you will misunderstand what I meant.
Yes both Hk China and Taiwan use traditional Chinese. But HK China uses traditional Chinese in a little different way if we compare the ways Taiwannese use and Chinese Hk uses at the same time.
of course, I know China uses simple Chinese. ^^