The benchmark Shanghai Composite Index slipped 0.19 percent, or 5.52 points, to 2,853.98 in early deals.
The Shenzhen Composite Index, which tracks stocks on China's second exchange, eased 0.30 percent, or 5.26 points, to 1,740.03.
In Hong Kong, the Hang Seng Index dropped 0.47 percent, or 96.64 points, to 20,338.7.