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Chinese performers in traditional costumes perform during a sacrifice ritual for Huang Di in Huangling County, Northwest China's Shaanxi Province, where legend has it that Huang Di (Yellow Emperor) is buried. About 10,000 people attended the grand ceremony on Qingming Festival, also known as Tomb-sweeping Day that falls on April 5, a day for the Chinese to remember and honour one's ancestors. (Xinhua)