Migrant workers from Sichuan province play inside a video game centre after work in Dadun village in Zengcheng near the southern Chinese city of Guangzhou June 20, 2011, one week after militia fired tear gas in this factory town to quell rioting over the abuse of a pregnant street hawker who became a symbol of simmering grassroots discontent. Picture taken June 20, 2011. To match Special Report CHINA-MIGRANTS/ REUTERS/Bobby Yip (CHINA - Tags: POLITICS BUSINESS EMPLOYMENT)