The process was pretty easy. Like most people we brought a lot of documentation of our relationship; chat logs, e-mails, phone billing history, pictures. They ended up only looking at my passport and a few pictures from our photo album. They used English for the interview, however most people spoke Chinese with no problem. Our interview time was 7:15am, there was a big crowd out in front of the embassy at that time. Promptly at 7:15 they began letting people into the building, I accompanied my fiancee up to the floor below the embassy where I had to wait until the interview was over. Arriving early does not allow you to conduct the interview early. They call on people as they choose.