I have been to china several times with work (you may need to google that word). Standard work days are certainly not 15/16 hours with our supply base. Big or small companies and wages and standards of living are increasing.
China produces excellent quality products. It is also not unheard of to get tat in the uk. Europe and america.
They are certainly good enough for export but more high end goods cannot compete with Europe or the US. They probably will but the recent high speed train crash has been widley highlighted in the country at the way it is corner cutting with quality.