The interview will be conducted entirely in Cantonese,usually 5-6 people a group,introduce yourself one by one.the interviewer will ask you some questions based on your Cv and past experience.If you are not very interested in this job, it is not recommended to apply becaz the interview process will be very awkward and take a long time. And I believe most applicants who apply will receive an invitation for an interview because they have a lot of candidates and will interview at short notice.