Which oracle agents are better?

I know that Digital China and Neusoft mainly do Oracle Bone Inscriptions in Beijing. I found the following information for reference: there are several levels of agents in Oracle Bone Inscriptions, starting with the highest VAD, that is, value-added distributors, one *** 10, Fortis, Oracle Bone Inscriptions, Neusoft and so on. I can't remember it all. VAD can only have the right to ship.