Chinese business visa.

Hi,

I have to travel to Tibet cause the company that i work for needs assistance there, the Chinese Project Manager is sending me an Invitation letter right now.
the situation is that the nearest consulate in my region is in Costa Rica, am from Honduras.

in some days i will have to travel to Costa Rica in order to apply to this entry permit, could you give me some orientation to be completely ready to apply to this?

my purpose is not to loose any detail before arrive to CR and apply.