All of the Chinese case studies and trial results are ending up on biorxiv and other sites. The CDC is not a business and wouldn't be affected by trade considerations.
China has been kicking journalists and other westerns out of the country. I doubt they want to share what they did nor want to disclose what real infection rates are.
If only the world were so simplistic. 300 Chinese doctors and equipment arrived in Italy last week. They are anxious to share what they know, to help, and heal, as doctors do. That the CCP gets good press out of it is the sort of “soft power” that the US has forgotten.
Send some to China, get some Chinese surgeons and EMT over in the US.
Oh right: we shouted at them because reasons. Hard to be nice, when they have knowledge we need and the posture is shouty.