Difference in quality in products made in China?

Thanks to all who have responded so far. In a global economy, my question may actually be irrelevant. Everybody borrows( or is it steals??) from everybody else. Unfortunately, the days of economic nationalism are long gone. I say unfortunately because in the 1950's 60's and most of the 70's, American goods were in great demand because of the quality of American made products.

I also have a MacBook Air with no issues. I replaced my MacBook with it which was 6 years old when it finally died. So I don't think quality control is an issue with foreign companies in China who care about their reputation.

Been there - done that - got the repair bills

Won't ever buy components or wire from china EVER!,

Some iec connectors/plugs seem to be OK.

Since most stuff is built there these days its probably the same as with everything else - buy brand names!

I worked as field engineer for a company that built power plants. We sourced main steam valves (valves that feed the turbine lines) to a Chinese oompany because of price. These valves have to be forged high strength steel alloys. Long story short, we discovered that the valves we installed were two piece welded. That was a disaster waiting to happen.

Ever since then, I shy away from made in china for everything. Every new baby food story etc reinforces the feeling.

Well I got my first bad component that was made in China. It was a used XiangSheng 728A tube preamp that was made a couple of years ago. The previous owner babied it and sent it to me in original packaging. I've bought from this seller before and I know his gear is well taken care of. When I got the 728A I was swapping out tubes and removed those metal retaining clips on the tubes and put the tubes I wanted to roll in. I thought I was being careful with the swapping but when all was said and done one of the tubes wouldn't light up. I had no sound from the other channels. I take the preamp to my tech and from what he saw the soldering of the sockets to the circuit board were shoddy. Also I managed to crack the circuit board as well. He said the quality of the sockets used to was so so. This is a budget preamp so I wasn't surprised about the quality of the tube sockets. The soldering as well as the cracking of the circuit board was surprising.

I've been good with the bevy of China made products I've boght. From Tube phonos, Amps and solid state preamps it has been a good experience. This one was a shocker to me.