Jun. 2, 2009 (China Knowledge) - Hong Kong stocks declined 57.65 points or 0.31% to end the morning session at 18,830.94 points, with mainboard turnover standing at HK$54.78 billion.The Hang Seng China Enterprise Index, which tracks the overall performance of 43 Chinese mainland state-owned enterprises on the Hong Kong Stock Exchange, swelled 54.22 points to 10,992.07 points.Market heavyweight HSB
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