The sample adjustment of the ChiNext 50 and ChiNext 100 indexes, with a total market value coverage rate of 63%.

On February 27, the Shanghai Stock Exchange and China Securities Index Co., Ltd. jointly announced that they have decided to adjust the constituents of the Science and Technology Innovation 50 Index and other indices. The adjustment will be implemented after the market close on March 13. Gundo Quantum, Zhongke Feice, and Zhongke Xingtu will be included in the Science and Technology Innovation 50 Index, while Rejing Biology, Siri New Materials, and Junshi Biology will be included in the Science and Technology Innovation 100 Index. After the adjustment, the total market value coverage of the Science and Technology Innovation 50 Index and the Science and Technology Innovation 100 Index will reach 63%, an increase of 1.1% from before the adjustment.