Recently, China Securities Index Co., Ltd. announced the adjustment of sample stocks for the csi 300, csi 500, csi 1000 indexes. This adjustment is a regular routine adjustment of sample stocks for the indexes, and the regular adjustment plan will officially take effect after the market closes on December 13. According to the index rules, after the review by the index expert committee, the csi 300 index will replace 16 sample stocks, with Chongqing Sokon Industry Group Stock, Bailey Tianheng, and others being added to the index; the csi 500 index will replace 50 sample stocks, with Longxin Micro, Tuojing Technology, and others being added to the index; the csi 1000 index will replace 100 sample stocks, with Shanghai Belling Corp.,Ltd., Sheng Ke Communications, and others being added to the index. In addition to the above indexes, samples of other indexes will also be adjusted accordingly. After this sample adjustment, the main index samples better reflect changes in the capital markets structure and the trend of industrial transformation and upgrading, with the number of samples in industries such as industry, information technology, communications services increasing, further enhancing the representativeness of the index.