If they want you they will try to make the interview long as possible. chinese people are inteviewed most of the times by chinese manager. he will ask to show your portfolio. just talk about your portfolio, you will enter the office if you get paid low salary. they will give a lot of importance about your previous office experiences so just talk about that as well. if chinesse manager finds you suitable, you will talk with german manager which will try to fake about his knowledge,