Rebar, for instance, may be spec'd to a minimum diameter by code/architect/engineer, but the supplier and/or contractor will literally stretch the rebar down some percentage, which has been found to be a major cause in building collapse.
I'm sure the same sub-par material probably can be found in the piping of chemical plants.
Say, didn't MoonBeam Brown buy Chinese to repair and maintain Kali bridges?
Remember that huge bridge collapse in China that had hundreds of thousands of tons of garbage used as fill to reduce the amount of concrete needed?
Someone who had been to china recently has told me that a building that would take us a couple years to build are being built in just a couple months in china. Makes you wonder if they’ll still be standing in a couple years.