The Shenzhen Component Index closed 1.9 percent higher at 13,549.99 points.
The combined turnover of stocks covered by the two indices came in at 1.04 trillion yuan (164.41 billion U.S. dollars), up from 978.3 billion yuan on the previous trading day.
Stocks related to digital rural development, farming machinery led the gains, while shares in the coal and pork production sectors led the losses.
The ChiNext Index, tracking China's NASDAQ-style board of growth enterprises, gained 2.82 percent to close at 2,843.87 points Wednesday.
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