Group 1 - The Shanghai Stock Exchange and China Securities Index Co., Ltd. announced adjustments to the sample of the Sci-Tech Innovation 50 Index, effective after the market closes on March 13, 2026 [2] - GuoDun Quantum, ZhongKe FeiCe, and ZhongKe XingTu will be added to the Sci-Tech Innovation 50 Index, while Rejing Bio, Sry New Materials, and Junshi Biosciences, among 10 other securities, will be added to the Sci-Tech Innovation 100 Index [4]

Group 1 - The core point of the article is the adjustment of the Sci-Tech Innovation 50 Index by the Shanghai Stock Exchange and China Securities Index Co., which will take effect after the market closes on March 13, 2026 [1] Group 2 - Three companies will be removed from the index: Junshi Biosciences, Yingshi Network, and Tianneng Co., Ltd [1] - Three new companies will be added to the index: Guodun Quantum, Zhongke Feicai, and Zhongke Xingtou [1]

Group 1 - The article discusses the adjustment of stock lists, specifically the inclusion and exclusion of certain companies in the market [1] - Qihoo 360 Technology Co., Ltd. (stock code: 688561) is being added to the list, indicating a potential positive outlook for the company [1] - Shengyi Technology Co., Ltd. (stock code: 688183) is being removed from the list, which may suggest a negative sentiment or performance issues for the company [1]