There is a lot of trash coming from China without doubt. And a lot of US companies use plants in China for product for a couple reasons. The cost of doing business in US has gone up tremendously and a lot of folks are not interested in working anymore. Those products do have specs, and the plants and parts are inspected to insure they stay within spec. But I see a couple of different black markets, One is the knockoffs, I would agree lower specs/standards because the company they stole the technology from doesn't inspect the product or the factories and the ones making them probably don't care. But what I do see a lot of are the same factories that produce the OEM have parts going out the back door with the same spec, material and can be sold for a much lower cost, that's a lot of profit margin for these Chinese companies. I started to list examples but afraid I would be opening a can of worms.