Basically, it is that you get a translated version from notarization bureau in China, if your DL is old version with no English on it.
Or, if you are outside China, and where you can apply for an international Driver's License, just spend 20-30 dollar and apply one for the sake of troubles.
And there are lots of partners on campus here... there should be a way for your wife to get a Visa. Have you emailed Sabine for information? Good luck!
to answer your question: both. some go into MC while others go into the IT consulting arm of McK. it all depends on the background of the individual. if they have technical background, McK is inclined to bring them into the IT consulting arm.
what type of information are you looking for, with regards to those chinese students that have gotten into consulting after MBA? contact information? then i would say that it is impolite to give their contact information on a forum like this. background information? they come from various backgrounds. some hail from consulting, while others come from industry.
go to the insead information session. you can find out if there's one coming up in your area go for the world mba tour. insead usually has alumni helping out there. from there, it is much easier to get their contact information.