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The Hang Seng Index fell 0.56 percent, or 172.37 points, to 30,588.04.
The benchmark Shanghai Composite Index slipped 0.42 percent, or 13.35 points, to 3,141.30 and the Shenzhen Composite Index, which tracks stocks on China's second exchange, dropped 0.93 percent, or 17.02 points, to 1,810.03.