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The Hang Seng Index fell 2.28 percent, or 697.06 points, to end at 29,886.39.
But the benchmark Shanghai Composite Index inched up 0.07 percent, or 2.40 points, to 3,256.93, while the Shenzhen Composite Index, which tracks stocks on China's second exchange, rose 0.47 percent, or 8.63 points, to 1830.84.