According to the index rules, the exchange announced that after reviewing by the index expert committee, the Shanghai Stock Exchange and China Securities Index Co., Ltd. decided to adjust the sample stocks for the sse 50 index, sse 180 index, sse 380 index, and sse science and technology innovation board 50 index, effective after the market closes on December 13, 2024. The sse 50 index will replace 5 samples, the sse 180 index will replace 18 samples, the sse 380 index will replace 38 samples, and there will be no changes to the sse science and technology innovation board 50 index.