Jun. 23, 2009 (China Knowledge) - Hong Kong stocks retreated on Tuesday morning, with the benchmark Hang Seng Index opening 482 points lower at 17,578.The Hang Seng China Enterprise Index, which tracks the overall performance of 43 mainland Chinese state-owned enterprises on the Hong Kong Stock Exchange, opened 305 points lower at 10,334. Top insurer China Life Insurance<601628><2628>&
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