Group 1 - The Shanghai Medium Enterprises Composite Index (000020) opened high and rose by 1.18%, closing at 1325.48 points with a trading volume of 148.314 billion yuan [1] - Over the past month, the index has increased by 2.04%, by 16.23% over the last three months, and by 9.94% year-to-date [1] - The index is calculated using a free-float market capitalization weighting method, with a base date of December 28, 2007, set at 1000.0 points [1] Group 2 - The top ten weighted stocks in the index include: SMIC (5.22%), Cambrian (3.47%), Stone Technology (0.98%), Sitaiwei (0.9%), Huahai Qingke (0.85%), Pacific (0.82%), Hengxuan Technology (0.82%), Chufeng Power (0.77%), Tuojing Technology (0.7%), and Longxin Zhongke (0.66%) [1] - The index is composed entirely of stocks listed on the Shanghai Stock Exchange, with a 100% representation [1] Group 3 - The industry composition of the index includes: Information Technology (33.04%), Industrials (23.12%), Consumer Discretionary (11.13%), Health Care (10.53%), Materials (8.80%), Consumer Staples (4.97%), Communication Services (4.42%), Financials (1.75%), Real Estate (0.98%), Utilities (0.85%), and Energy (0.41%) [2] - The index samples are adjusted annually, with adjustments implemented on the next trading day after the second Friday of June [2] - Temporary adjustments to the index samples may occur under special circumstances, such as when a sample no longer meets the medium enterprise classification standards or when a sample is delisted [2]

Group 1 - The Shanghai Composite Index decreased by 0.46%, while the Shanghai Medium Enterprises Composite Index fell by 0.58%, closing at 1258.1 points with a trading volume of 121.209 billion yuan [1] - Over the past month, the Shanghai Medium Enterprises Composite Index has declined by 0.87%, increased by 3.01% over the last three months, and has risen by 6.20% year-to-date [1] - The index is calculated based on a free-float market capitalization weighting method, with a base date of December 28, 2007, set at 1000.0 points [1] Group 2 - The top ten weighted stocks in the Shanghai Medium Enterprises Composite Index include: SMIC (6.02%), Cambrian (4.39%), Stone Technology (1.22%), Chuan Investment Energy (1.05%), Hengxuan Technology (0.92%), Pacific (0.9%), Huahai Qingshi (0.8%), Tuojing Technology (0.73%), Proya (0.67%), and Jingfang Technology (0.67%) [1] - The index is composed entirely of stocks listed on the Shanghai Stock Exchange, with a 100% representation [1] Group 3 - In terms of industry composition, the index shows that Information Technology accounts for 32.95%, Industry for 21.72%, Consumer Discretionary for 11.13%, Healthcare for 10.55%, Materials for 8.70%, Consumer Staples for 5.20%, Communication Services for 4.37%, Financials for 2.12%, Utilities for 1.97%, Real Estate for 0.97%, and Energy for 0.32% [2] - The index samples are adjusted annually, with changes implemented on the next trading day after the second Friday of June, and can be adjusted temporarily under special circumstances [2] - Adjustments to the index will occur if a sample no longer meets the medium enterprise classification standards or if a sample is delisted; mergers, acquisitions, and spin-offs will be handled according to maintenance guidelines [2]