明日生效，A股重要调整

Group 1 - The sample adjustments for indices such as the Shenzhen Component Index and ChiNext Index will be officially implemented tomorrow, while adjustments for indices like the SSE 50 and STAR 50 have already taken effect after the market close on December 12 [1] - The CSI 300 Index will replace 11 samples, including Huadian New Energy, Dongshan Precision, and Shenghong Technology [1] - The CSI 500 Index will replace 50 samples, with companies like Heertai, Huahong Company, and Dongfang Yuhong being added [1] Group 2 - The Shenzhen Component Index will replace 17 samples, including Deep Shenzhen A and Demingli [3] - The ChiNext Index will replace 8 samples, with companies such as Shuanglin Co., Changshan Pharmaceutical, and Changxin Bochuang being added [5] - The Shenzhen 100 Index will replace 7 samples, including Cangge Mining and Guohua Airlines [8] Group 3 - The ChiNext 50 Index will replace 5 samples, with companies like Changshan Pharmaceutical, Feilihua, and Changxin Bochuang being added [9] - The SSE 50 Index will replace 4 samples, including SAIC Motor, Northern Rare Earth, and Zhongke Shuguang [1] - The SSE 180 Index will replace 7 samples, with companies such as Guotou Capital and Zhongtian Technology being added [1]