China's Shanghai Composite Index opened down 0.27 points on May 21 (Wednesday), a drop of 0.01%, at 3380.21 points;
China's Shenzhen Component Index opened down 2.66 points on May 21 (Wednesday), a drop of 0.03%, at 10246.51 points;
China's CSI 300 Index opened up 1.27 points on May 21 (Wednesday), an increase of 0.03%, at 3899.44 points;
China's ChiNext Index opened up 3.54 points on May 21 (Wednesday), an increase of 0.17%, at 2052 points;
China's Science and Technology Innovation 50 Index opened down 1.02 points on May 21 (Wednesday), a drop of 0.1%, at 996.66 points.
