have I got this right?
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)30251-8/fulltext
"Although our phylogenetic analysis suggests that bats might be the original host of this virus, an animal sold at the seafood market in Wuhan might represent an intermediate host facilitating the emergence of the virus in humans."
Step 1 engineer bat viri in lab (I'm not not clear what was mixed)
Step 2 release/supply infected bat(s) to the seafood market
Step 3 humans in proximity to those bats are patient zero