honggil, there are plenty of information from pages after pages of this thread with regards to the stages.
Stage 1: Initial Test
Stage 2: Aptitude Test
Stage 3: Initial Interview
[ICAO English Proficiency Test]
[HKCAD Medical Exam]
Stage 4: Technical Interview + Group Exercise
Stage 5: Flight Grading
First interview consists of HR interviewing you and the questions are geared towards you and KA.