I don't wanna be sarcastic but what would be the point to ask for the success rate if you can't even get into the game? Unless you have a HKID OR an ICAO ATPL with 1500 hours your success rate would be, Zero.
ICAO ATPL with 1500 hours? I thought they stopped the TT recruitment stream with the Advanced Entry. Wouldn't their success rate also be Zero unless you have HKID?