If you haven't receive the interview, please check the junk mail, it might be there. The interview format ia face-to-face, you need to register as a visitor after enter the building, so that you can go to that floor. The interview is pretty easy, just feel free to speak, it can speak in cantonese or english, just depends on you.
Interview questions [1]
Question 1
1. Self intro 2. technical problem 3. your experience