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Music fans blow bubbles while enjoying the Zhangbei Grassland Inmusic Festival held in Zhangbei County, north China's Hebei Province, July 30, 2011. The third Zhangbei Grassland Inmusic Festival, lasting from July 29 to 31, gathered 56 bands and artists from at home and abroad and attracted tens of thousands of fans. (Xinhua/Jin Liangkuai)

A band performs at the Zhangbei Grassland Inmusic Festival held in Zhangbei County, north China's Hebei Province, July 30, 2011. The third Zhangbei Grassland Inmusic Festival, lasting from July 29 to 31, gathered 56 bands and artists from at home and abroad and attracted tens of thousands of fans. (Xinhua/Jin Liangkuai)