Not lying.
The swine flu definitely evolved from a pig farm:
"At CDC the head of virology had completed the genetic fingerprinting of the swine flu and was able to say that it had arisen from a strain first identifiable on industrial pig units in North Carolina in the late 1990s" (CDC).
"[W]ith recent pandemic virus threats from influenza viruses such as
H1N1 (swine flu) or
H5N1 (bird flu) there is no ambiguity: those viruses evolved on chicken and pig factory farms" (The Guardian).
The Spanish flu of 1918 can only be theorized about and many people have their different theories but: "[t]he widely accepted theory is that in the spring of 1918, the illness spread from farm animals in Haskell County, Kansas to the young men at Ft. Riley who were drafted for World War I" (Kake).
And I'm not going to argue about the poor conditions in wet markets- I agree with you there. (I can agree that conditions for animals in China are generally much worse than ours in the western world. Wet markets are disgusting and worse than western factory farms. I agree. But, I think that our practices are depraved, as well. Factory farmed animals in Australia, the UK, and America still live in disgustingly poor conditions, and factory farms in the western world are also breeding grounds for pandemics. That's why we have to pump our animals full of antibiotics, causing antibiotic resistance and unnecessary deaths in our consumers.) Anyway, I wasn't addressing that argument. I was addressing the argument that I've been seeing often that the pandemic started in China because the Chinese eat the wrong animals, which is nonsense.