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The Hang Seng Index slipped 0.91 percent, or 280.45 points, to 30,510.38.
And the benchmark Shanghai Composite Index dropped 1.14 percent, or 36.08 points, to 3,130.57, while the Shenzhen Composite Index, which tracks stocks on China's second exchange, fell 1.18 percent, or 21.59 points, to 1,808.10.