Complex sentence: Take China as an example, in 2009 alone, approximately one million workers were injured at work and about 20,000 suffered from diseases due to their occupation since the sweatshop factories do not provide any safety guidance for their employees.
Split into simpler sentences: Take China as an example, in 2009 alone, approximately one million workers were injured at work and about 20,000 suffered from diseases due to their occupation. The reason for this is that the sweatshop factories did not provide any safety guidance for their employees.