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The Shanghai Composite Index, which covers both A and B shares, was up 3.30 points at 2,912.44.
Global oil prices rallied Monday in the aftermath of Western air strikes on Libya and heightened turmoil in Yemen, both oil exporters.
The Shanghai A-share index rose 0.11 percent, or 3.44 points, to 3,049.42 while the Shenzhen A-share index was down 0.06 percent, or 0.83 points, at 1,344.97.