please pay more attention to Chinese factories those which work more than 70 hours per week and not permit workers quit

i've been working in Guangdong Province (China)for 8 years,
most of time,i worked in factories as an ordinary worker,as far as i have experienced and as far as i know,most factories in China do not practise full law. in the 8 years,i've been worked more than 6 factories,there was only one obey the full law,the rest of them always made the worker work around or more than 70 hours per week,we are the cheapest labour in the world,and when the people in the rest of the world enjoy our Chinese products,maybe they don't know that was out of thousands of people's overtime work,which the workers may or may not have full social security.their salaries just enough for themselves,if they have family to feed ,they have to saving a lot.please give us more attention,we just felt tired!we need help!