China's Shanghai Composite Index closed down 15.61 points, or 0.39%, at 3936.52 on Wednesday, September 23. The Shenzhen Component Index closed down 87.66 points, or 0.64%, at 13636.07 on Wednesday, September 23. The CSI 300 Index closed down 27.31 points, or 0.6%, at 4517.28 on Wednesday, September 23. The ChiNext Index closed down 20.32 points, or 0.6%, at 3379.61 on Wednesday, September 23. The STAR Market 50 Index closed down 4.19 points, or 0.25%, at 1660.85 on Wednesday, September 23.