Jun. 17, 2009 (China Knowledge) - Hong Kong stocks retreated on Wednesday morning, with the benchmark Hang Seng Index opening 181 points lower at 17,985.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 130 points lower at 10,580. Zijin Mining Group Co Ltd<601899><2899> incre
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