Group 1 - The Shanghai Composite Index opened high and rose, with the Shanghai 180 Infrastructure Index increasing by 1.19% to 1889.98 points and a trading volume of 39.504 billion yuan [1] - The Shanghai 180 Infrastructure Index has seen a decline of 2.53% over the past month, 1.62% over the past three months, and 3.00% year-to-date [2] - The index is based on the Shanghai 180 Index and includes listed companies in infrastructure, resources, and transportation themes, reflecting their overall performance in the secondary market [2] Group 2 - The top ten weighted stocks in the Shanghai 180 Infrastructure Index include: Yangtze Power (13.97%), China Telecom (8.57%), China State Construction (8.4%), China Mobile (7.18%), China Unicom (6.69%), China Nuclear Power (5.47%), Three Gorges Energy (4.45%), China Railway (4.31%), China Power Construction (3.9%), and Guodian Power (3.1%) [2] - The index's holdings are entirely from the Shanghai Stock Exchange, with the public utility sector accounting for 40.05%, industrial sector for 36.17%, and communication services for 23.79% [3] - The index samples are adjusted semi-annually, with adjustments occurring on the next trading day after the second Friday of June and December each year [3]

Core Viewpoint - The A-share market showed mixed performance with the Shanghai 180 Infrastructure Index rising by 0.22% to 1883.26 points, with a trading volume of 29.432 billion yuan [1] Group 1: Index Performance - The Shanghai 180 Infrastructure Index increased by 0.84% over the past month and 1.78% over the last three months, but has decreased by 2.41% year-to-date [2] - The index is based on the Shanghai 180 Index and includes listed companies related to infrastructure, resources, and transportation, reflecting their overall market performance [2] Group 2: Index Composition - The top ten weighted companies in the Shanghai 180 Infrastructure Index are: - Changjiang Electric Power (14.26%) - China State Construction (8.58%) - China Telecom (8.28%) - China Mobile (7.12%) - China Unicom (6.14%) - China Nuclear Power (5.49%) - Three Gorges Energy (4.5%) - China Power Engineering (4.45%) - China Railway (4.28%) - Guodian Power (2.97%) [2] Group 3: Sector Allocation - The index is fully composed of companies listed on the Shanghai Stock Exchange, with sector allocations as follows: - Utilities: 40.30% - Industrials: 36.92% - Communication Services: 22.78% [3] - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [3]