Red-faced organizers of the Beijing Olympics threatened Monday to cancel the contracts of companies using child labor and violating minimum-wage rules to make Olympic-licensed products...In a report released Sunday, PlayFair 2008 -- an alliance of global trade union and labor groups -- cited four factories in southern China for labor violations...[the 4 factories are] Lekit Stationery Company, Yue Wing Cheong Light Products (Shenzhen), Eagle Leather Products, Mainland Headwear Holdings...