They call the new menu item "Napoli Crispy Pizza Chicken" and each piece seems to be brushed with pizza sauce and sprinkled with a blend of melted mozzarella and cheddar cheeses.
The new chicken is available for a limited time and looks to be inspired by Neapolitan pizza. It's priced the same as their other varieties of chicken at $18 HK (~$2.32 US) a piece