Group 1 - The A-share market's three major indices closed mixed, with the STAR Market 50 Index (STAR 50) down by 0.89% to 983.11 points, with a trading volume of 20.414 billion yuan [1] - The STAR 50 Index has seen a slight increase of 0.03% over the past month, a rise of 5.52% over the past three months, and a year-to-date increase of 0.30% [1] - The STAR 50 Index consists of 50 securities from the STAR Market with high market capitalization and liquidity, reflecting the overall performance of representative STAR enterprises [1] Group 2 - The top ten weighted stocks in the STAR 50 Index include: SMIC (10.33%), Haiguang Information (8.51%), Cambricon (7.57%), Lattice Semiconductor (6.34%), Zhongwei Company (5.39%), United Imaging (4.23%), Kingsoft Office (4.22%), Transsion Holdings (2.35%), Ninebot (2.26%), and Chipone (2.19%) [1] - The STAR 50 Index is entirely composed of stocks listed on the Shanghai Stock Exchange, with a sector breakdown showing 68.83% in Information Technology, 11.80% in Healthcare, 11.66% in Industrials, 4.39% in Consumer Discretionary, 2.66% in Materials, and 0.66% in Consumer Staples [2] - The STAR 50 Index undergoes quarterly adjustments, with changes implemented on the next trading day following the second Friday of March, June, September, and December, with a maximum adjustment of 10% [2]

Group 1 - The Shanghai Stock Exchange Sci-Tech Innovation Board 50 Index (Sci-Tech 50) opened higher and fluctuated, rising by 0.24% to 984.95 points with a trading volume of 19.704 billion yuan [1] - Over the past month, the Sci-Tech 50 Index has increased by 0.57%, but it has decreased by 3.92% over the past three months and by 0.64% year-to-date [2] - The Sci-Tech 50 Index consists of 50 securities with high market capitalization and liquidity from the Sci-Tech Innovation Board, reflecting the overall performance of representative Sci-Tech enterprises [2] Group 2 - The top ten weighted stocks in the Sci-Tech 50 Index are: SMIC (10.35%), Haiguang Information (8.5%), Cambricon (7.68%), Lattice Semiconductor (6.2%), Zhongwei Company (5.28%), Kingsoft Office (4.24%), United Imaging (4.21%), Transsion Holdings (2.35%), Chipone Technology (2.27%), and Ninebot (2.27%) [2] - The index is fully composed of stocks listed on the Shanghai Stock Exchange, with the information technology sector accounting for 68.86%, healthcare for 11.91%, industrials for 11.41%, consumer discretionary for 4.45%, materials for 2.72%, and consumer staples for 0.66% [2] Group 3 - The sample of the Sci-Tech 50 Index is adjusted quarterly, with adjustments occurring on the next trading day after the second Friday of March, June, September, and December [3] - The adjustment process allows for a maximum of 10% change in the number of samples, with a buffer rule prioritizing the top 40 candidates for inclusion and the top 60 existing samples for retention [3] - In cases of sample delisting, mergers, or other changes, the index will follow specific guidelines for replacement and adjustment [3]