China said Wednesday that it had broken up a child labor ring that provided children from poor, inland areas with work in booming coastal cities, acknowledging that severe labor abuses extended into the heart of its export economy. Authorities in southern China's Guangdong Province, near Hong Kong, said they had made several arrests and had already "rescued" more than 100 children from factories in the city of Dongguan, one of the country's largest manufacturing centers for electronics and consumer goods sold around the world. The officials said they were investigating reports that hundreds of other rural children had been lured or forced into captive, almost slavelike conditions for minimal pay. The children, mostly between the ages of 13 and 15, were often tricked or kidnapped by employment agencies in an impoverished part of western Sichuan Province called Liangshan and then sent to factory towns in Guangdong, where they were sometimes forced to work 300 hours a month, according to government officials and accounts from the state-owned media. The legal working age in China is 16. The labor scandal is the latest embarrassment for China as it prepares to host the Olympic Games this summer. For much of the past year, the country has been plagued by damaging reports about severe pollution, dangerous exports, riots in Tibet and the ensuing disruptions to its Olympic torch relay by Tibet's sympathizers, among other groups. The abuses may also reflect the combined pressures of worker shortages, high inflation and a rising currency that have reduced profit margins of some Chinese factories and forced them to scramble for an edge