If the business suddenly dried up, which I doubt, it could be a lot more easily proven than via some arcane and long, drawn out secret camera technique. There have been prior business downcycles, right, but did Longwei previously adopt some fraudulent scam in reaction? I can't say for sure, but I do not think so.
You are certainly entitled to the opinion that the film crew was unbiased. I can't say that I buy it since in rapid-fire succession we had ALL these highly negative claims launched in an overwhelming salvo that drove S/P through the floor. It just doesn't seem logical that all of this "stuff" happened coincidentally and without orchestration.
All JMHO.
I have always liked this company and I am not changing my mind until there is some conclusive proof beyond innuendos and connect-the-dots "theories" that are claimed to be "Ah-Ha" moments.