From The Business-Standard, May 27, 2020:

‘Scientists collected viral genome samples from 326 patients in Shanghai between January 20 and February 25. They identified two major clades, both of which included cases diagnosed in early December 2019. The scientists noticed that genomes of six patients with contact history related to the Huanan seafood market fell into one kind of clade while those of three other patients diagnosed in the same period but without exposure to the market clustered into the other clade, suggesting multiple origins of transmission in Shanghai.’

Earlier the Chinese study into the origin of the novel coronavirus have suggested that the virus, which caused havoc on the globe, had its origin in the famous Huanan seafood market in Wuhan.”

This news doesn’t mean necessarily refute the theory that the virus was spread from the 7th World Military Games at Wuhan in October 2019. It’s still quite within the range of probability that the Games were the point of dissemination of the virus in China and some clades of the virus stayed in Wuhan, while others were transported to Shanghai.

But it also doesn’t mean that the US was the country behind the dissemination. It could also have been China itself…or some other hitherto unsuspected nation.

Frankly, we just don’t have enough data to do more than speculate.