secured our Visas and invitations from iBelink (manufacturing co) with personalized invitations which are REQUIRED to visit China.
Although i do not doubt the legitimacy of these guys and the miners.
I do want to point out that it is NOT TRUE that personalized invitations are REQUIRED to visit China.
China is one of the easiest countries to get a visa for. You just apply at the visa office and give them a flight reservation and you got your visa... plain and simple
not only is it that simple to get a visa, but any expat living in China knows that all you need to do to get another visa is to cross into Hong Kong, apply for a new visa and in 24 hours you have a new visa and can go back in to Mainland China... You can do this practically forever. Alot of people teach, live, work here and they do that all the time, its common practice.
Not sure if they are just misinformed, or ?
if you wanna do it the legal right way and the travel is for business, you need a business visa. (many just apply for turist visa even if they go for business).