9/8 Beijing parents B2 Pass

My wife took her parents to Beijing so I didn't know much detail. Her father just retired and her mom never works. I don't think they have much saving. They have one apartment. I filled out ds160 form for them. It sounds like B2 visa is kind easy now. The only problem they got is that ds160 instruction didn't tell them they need to write down their name, address, and code on their ds160 receipt. They have a code book inside embassy though. Good luck to everyone.