China's Shanghai Composite Index opened down 0.76 points, or 0.02%, at 3951.37 on Wednesday, September 23. The Shenzhen Component Index opened up 18.81 points, or 0.14%, at 13742.55. The CSI 300 Index opened up 3.02 points, or 0.07%, at 4547.61. The ChiNext Index opened up 12.6 points, or 0.37%, at 3412.53. The STAR Market 50 Index opened up 6.73 points, or 0.4%, at 1671.77.