No, they can afford to sell it for cheaper than for example some Western equivalents because they have better efficiency (they also made it for 'cheaper') during production. This is due to technological and business innovation, world-leading government support and policies, etc...
Just because they are selling it for cheaper, doesn't mean that they are getting "screwed over". Value creation is also about cost efficiency.
In fact, by pricing it cheaper, they attract more orders. But, at the end of the day, we still see that they are increasingly profitable, and taking over industry by industry. So, idk what are you about and what your problem is, it is clearly working. This is a standard good business practice btw.
We all know that GDP is a weird concept: Domestic work is excluded, imaginary rent on house is included as may many still funnier things. Anyway this value off all final purchases is helpful to characterize many trends and relations. Let's look at the basics:
GDP can be calculated in different ways. The value of all items sold for end use is total of money received:
Y = W + Q + T or wages + profits + (taxes less subsidies on production)
The total of payments done for them is:
Y = C + I + G + (X – M) or consumption + investments + government spending + net exports
By marking them equal and rearranging we get the Kalecki-Levy profit equation:
Q = I + (G – T) + (X – M) – (W –C) or Profits equals Investments + StateDeficit + TradeSurplus – PrivateSavings
The concept of NationalSavings has not been used above. It is calculated as Profits + PrivateSavings where Profits dominate by far.
Both in US and in China very large government deficits help to make total profits very large. In US the trade deficits works against this while in China the surplus helps a lot. The fact that large companies having a monopoly or oligopoly are making huge profits implies that countless small companies are struggling. High quotations in stock exchanges are not indicative of the health of the economy. Withering middle class and the misery of poor people are real indicators.
I myself have some difficulty in understanding how the Chinese workers have managed to get those marvelous rises after 2000 while Chinese unions are weak. A good guess is that as employers are in very weak position in China this helps tremendously the workers in swapping for better pay. In the US the regulatory caption by big money has helped to form legislation and to smash unions. Many industries have agreements between companies not to use wage increases to attract employees. This hurts the whole economy as actual demand remains smaller as it should. In China that is not possible.
The whining about too large Chinese savings rate is comical. Effectively that figure says that profits are large.
