Correct me if I'm wrong, but the base for all cadet pilots will be Hong Kong for the first few years. You can only get a base once upgraded to FO.
Upgrade time to JFO will be around 3 to 3.5 years, and add another 6 months minimum before upgrading to FO, at which point you can go on a base (provided slots are available and you hold enough seniority to get one during a bid period).