 This is the VOA Special English Technology Report. A labor group has begun investigating working conditions at the Chinese factories where many Apple products are made. Apple officials ordered the investigation after the New York Times described poor working conditions at the factories. The Foxconn Technology Group owns the manufacturing plants in Zhenzhen, Chengdu and Zhenzhou. Angela Cornell is a professor at the Cornell Law School in Ithaca, New York. She says many issues were raised last year after a number of suicides at the Foxconn factories. One issue is the number of hours that employees are required to work. Other concerns involve pay, living conditions and even reports of violence against workers. The New York Times reported that employees sometimes worked seven days a week. The newspaper said some stood so long that they had trouble walking. Widespread criticism of Apple followed publication of those reports. Mark Shields organized a campaign calling for better working conditions. Workers' lives are really hard and really severe. And there's terrible stories about people losing the use of their hands because of horrible, repetitive motion injuries and suicide rates that are so high that they have got to hang nets off the sides of the buildings to prevent workers from killing themselves. Professor Cornell says the conditions at the Foxconn factories had to have been really bad. Just imagine how dire the working conditions would have had to be for those workers to sacrifice their lives. Professor Cornell says even Apple's own reports noted issues at some of its factories. These included involuntary labor and underage labor. These are important issues. The involuntary laborers are indentured migrant workers. And that is a crucially important issue. I mean, that's basically slave labor. More than 200,000 people have joined Mark Shields' campaign for better working conditions. The American admits he loves his Apple products. But he says he wants them to be made without human suffering. In re-vated developments, Foxconn said it was raising the pay of its workers in China for the third time since 2010. And Apple asked the Fair Labor Association to investigate conditions at the Foxconn factories. Apple recently joined that association. The non-profit group was established in 1999 to investigate working conditions around the world. For VOA Special English, I'm Carolyn Presuti. Get more news and learn English at voaspecialenglish.com.