Group 1 - The Shanghai Stock Exchange and China Securities Index Company announced a quarterly adjustment of the sample stocks for the Sci-Tech 50 and other Sci-Tech indices [1] - The Sci-Tech 50 Index will replace three sample stocks, specifically Guoshun Quantum, Zhongke Feimeng, and Zhongke Xingtou [1] - Additionally, ten securities including Rejing Bio, Sry New Materials, and Junshi Biosciences will be added to the Sci-Tech 100 Index [1] - The adjustments will take effect after the market closes on March 13 [1]