Group 1 - The Shanghai Stock Exchange National New Sci-Tech Board State-Owned Enterprises Index (950253) opened lower and fluctuated, down 0.7% to 1080.78 points, with a trading volume of 26.665 billion yuan [1] - Over the past month, the index has increased by 8.98%, by 9.11% over the past three months, and by 11.89% year-to-date [1] - The index is composed of state-owned enterprises listed on the Sci-Tech Board or companies with state capital participation without actual control, reflecting the overall performance of state-owned enterprises in the Sci-Tech Board [1] Group 2 - The index samples are adjusted every six months, with adjustments implemented on the next trading day after the second Friday of June and December [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made under special circumstances [2] - Companies that are delisted or undergo mergers, acquisitions, or splits are processed according to calculation and maintenance guidelines [2]