If China did this to us, why do they keep showing us some of the most frightening sights the West has seen?
"Hey West, we're killing literally all our cats and dogs, so [wrings hands] you should totally do that too!"
I have never understood the line that "China did this to us!"
(i) Why would anyone in China ever even imagine that releasing videos of Chinese officials welding people into their apartment buildings would coax folks in the West to follow their example?
(ii) Why would China STILL (let themselves) appear to be engaged in the same authoritarian interventions two years later? ...which would just demonstrate that these interventions do NOT work.

Simplest explanation: The Chinese government is evil, lacks even a dab of respect for civil liberties, and ends up partaking in breathtakingly stupid policies.
Sure, they're also always at work trying to undermine the West, but a scheme to do THAT in regards to lockdowns/shutdowns would be one that instead looked efficient, clean, friendly and functional.
Bludgeoning pet dogs to death, for food, for profit or for 'public health', is nothing new in China. They do worse, much worse, things I don't even want to tell you about. Their capacity for sadistic acts of cruelty in the pursuit of profit, driven often by a primitive belief in superstitious 'medicine' or pseudoscience knows no bounds. It is also widespread and industrial in scale. As with animals, so also with fellow human beings. Western governments have largely ignored their human and animal rights abuses for years, in their eagerness to enjoy a slice of the economic pie which China was offering. Now, we find that they are actually not ignoring their human rights abuses anymore; they've incorporated them into national pandemic response policies and soon will incorporate them into official global pandemic preparedness policy. No doubt, the culling of 'potential vector species' will also be included as part of that global pandemic preparedness treaty which many Western administrations are already eager to sign up to. So be prepared to say goodbye to your chickens, your dogs, your cats, your farm animals, if the World Hell Organisation deems them to be a potential health risk in the middle of a 'pandemic' (which the WHO will also conveniently define). Yes, Shanghai may well be a glimpse of the nightmarish future which faces us if the Chinese controlled WHO get their evil way with this treaty.
If you all have not yet heard, the CCP has shut down the port in Shanghai which is a key port within the global supply chain, a supply chain already in bad shape because of these foolish covid restrictions.
No one with half a brain would do something this idiotic unless they are intentionally trying to damage the supply chain and cause mass chaos, famine, ect. Our elected leaders, at least most of them, are intentionally trying to bring about a state of chaos that can be used to just enacting the Authoritarian Turn key Police State they have in place.