Hello i am CHARLES by name i am from Nigeria i would like to no if a company send an INVITATION LETTER TO OUR COMPANY WITH THEIR OFFICE LETTER HEAD AND A RED CHOP DOES THAT MEAN THE COMPANY THAT SEND THESE INVITATION LETTER WILL SERVE AS GURRANTY for the welfare and accomodation of the invitee during his stay in china?They said their company is registered with the chinnese government do they need to go through the chinnse goverment before they can send and the INVITATION LETTER COULD BE RECOGNIZE IN nigeria pls advise