Upvote:2
It is possible (mandatory even) for individuals who meet several conditions to apply without the interview, though you'll still need to put all the usual paperwork together for the application. If she meets the conditions, she can drop off the documents at a bank branch and receive a visa without having to appear for an interview. Otherwise, the interview is, unfortunately, required.
The good news is that, thanks to an agreement a few years ago between the US and China, I understand there's a good chance she'll be issued a 10-year multiple entry visa now. This will give her a visa that she can use for multiple trips within a 10-year period without needing to reapply.