Thats why price is cheap, almost everything is made in china, but used components or the quality is not china fault, that is a decision from the manufacture or from the design. The same factory can produce original grade products and crappy clones, they want profit not good stuff with low profit. They also degrade quality by steps so when you buy replacements of replacements you will not notice a big change, change from 9 to 1 is big change, but if they do that at steps like 9,8,7,6 and you itenerate all steps you won't notice that huge difference which become a good profit for them, this happen on copy phone LCDs for example where price go lower and lower with time
iPhone is made on a china factory with high grade components, still apple can decide to use low grade components instead, that's not a problem from China, the developer decide the product quality not china. That doesn't mean iPhone is good anyway
Now things that are made in china from china requested by a bussiness man to make some sells still a problem from that guy who requested that stuff to be made and not from China (Country)
I bet any country can produce really crap stuff if they want as good stuff as well, is all a matter of money/profit or a end
PS: I buy lot of products from china, and i found some are really good, others are crap, still my experience is much more positive than otherwise.