China's Shanghai Composite Index opened up 12.45 points on January 21 (Tuesday), an increase of 0.38%, at 3256.83 points; China's Shenzhen Component Index opened up 66.72 points on January 21 (Tuesday), an increase of 0.65%, at 10323.12 points; China's CSI 300 Index opened up 20.68 points on January 21 (Tuesday), an increase of 0.54%, at 3850.36 points; China's ChiNext Index opened up 20.34 points on January 21 (Tuesday), an increase of 0.97%, at 2125.07 points; China's Science and Technology Innovation 50 Index opened up 5.64 points on January 21 (Tuesday), an increase of 0.58%, at 973.91 points.