China e Mongolia
Here you can find some links (both in Italian and English... maybe some in French and some others in Spanish, why not?)
VISA (Italian)
Here you can find some useful information on the VISA needed in the listed nations. Very detailed.
China by camper (English)
Here I also made a request to understand what documents I need if I want to cross China from Mongolia down to Nepal. I also asked if they can handle the invitation needed to
ask the VISA.
Cina e Mongolia 2005
I found this link where Rita and his husband take a raid from Italy to China passing Russia and Mongolia. I sent them an email in the 20th January 2015 to ask some logistic questions on the famous guide/soldier you are supposed to carry around in that wonderful region but the email doesn't exist anymore.