From what I understand of my wife's explanation of how her interview day went down in Guangzhou....
She went in with a group of people who were scheduled at the same time block. They all put their P4 letters in a pile and they officer called them up for their interview one by one from the pile. She presented the documents to the interviewer at the time she stepped up for her interview. She said the interviewer hardly even looked at any of it, asked her 4 or 5 basic questions, told her she passed the interview, then launched into a very friendly casual conversation as she processed her paperwork. (We were an electronically processed case, so I'm not sure how much that affected their nonchalant attitude about her docs.)
Don't worry, if your paperwork hasn't triggered any red flags along the way you will breeze through the interview.
Chris&Mia got a reaction from DJ&L in Passport Tracking after approval
Chris&Mia got a reaction from Darnell in My wife thinks that the person at the document intake will ask her many questions