For the record, anyone working in the HW sector will tell you, Chinese suppliers will often try to scam you by delivering you parts that are faulty or lower spec than originally agreed and see if you notice. If you don't notice, then it's fair game and more money for them. They don't consider this swap as doing anything illegal or wrong if you don't notice, so you really need to have solid QA in house to keep your suppliers accountable, as this is a constant struggle. It's sad, but this is how business is done in this racket. Russia is now stuck between a rock and a hard place, with very little choice of suppliers and Chinese businesses know it and are taking this practice to the next level (beggars can't be choosers).

I can't find the comment now, but one HN member told a story here on how their POS credit card readers they sent for production to China, were being tampered with by malicious employees on the supplier side who were shaving internal parts of the case assembly to plant skimmers inside that would beam the credit card data. They were going so far as to match the weight of the tampered device to meet the spec by the milligram to avoid weight detection countermeasures. Insane.