China's main stock index fell for the fifth day in a row on Thursday amid vague market talks of a policy change ahead of a long weekend, pushing down property and cement issues.

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The benchmark Shanghai Composite Index finished at 2,887.0 points, breaking through the 2,900 point to a two-month low, after falling 0.5 percent on Wednesday.

Shanghai's B-share index of dollar-denominated stocks fell 2.8 percent after falling over 7 percent in early trading due to profit-taking.

Wang Aochao, head of research at UOB Kay Hian, said the sharp falls in B-share were a correction to the recent steep rise.