Group 1 - The A-share market's three major indices closed mixed, with the CSI 300 Power Index at 2638.31 points [1] - The CSI 300 Power Index has decreased by 0.46% over the past month, 4.42% over the past three months, and 4.39% year-to-date [1] - The CSI 300 Index categorizes its 300 sample companies into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The top ten weights in the CSI 300 Power Index are: Changjiang Power (48.33%), China Nuclear Power (10.63%), Three Gorges Energy (8.61%), Guodian Power (5.99%), State Power Investment (4.98%), Huaneng International (4.57%), Chuanwei Energy (4.24%), China General Nuclear Power (4.19%), Zhejiang Energy (2.94%), and Huadian International (2.81%) [1] - The market share of the CSI 300 Power Index is 95.46% from the Shanghai Stock Exchange and 4.54% from the Shenzhen Stock Exchange [1] Group 3 - In terms of industry composition within the CSI 300 Power Index, hydropower accounts for 59.91%, thermal power for 16.31%, nuclear power for 14.82%, and wind power for 8.97% [2] - The index sample is adjusted biannually, with adjustments occurring 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 when the CSI 300 Index samples are modified [2]

Group 1 - The Shanghai Composite Index opened high and fluctuated, with the CSI 300 Power Index reported at 2572.78 points [1] - The CSI 300 Power Index has decreased by 3.70% in the past month, 5.87% in the past three months, and 6.77% year-to-date [1] - The CSI 300 Index is categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The top ten weights in the CSI 300 Power Index are: Changjiang Electric (48.32%), China Nuclear Power (10.65%), Three Gorges Energy (8.79%), Guodian Power (5.75%), State Power Investment (5.02%), Huaneng International (4.56%), Chuanwei Energy (4.27%), China General Nuclear Power (4.15%), Zhejiang Energy (2.98%), and Huadian International (2.79%) [1] - The market segment of the CSI 300 Power Index is dominated by the Shanghai Stock Exchange at 95.49%, while the Shenzhen Stock Exchange accounts for 4.51% [1] Group 3 - In terms of industry composition within the CSI 300 Power Index, hydropower accounts for 59.96%, thermal power for 16.09%, nuclear power for 14.80%, and wind power for 9.15% [2] - The index sample is adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to changes in the CSI 300 Index [2]

Group 1 - The Shanghai Composite Index opened lower and the CSI 300 Power Index reported at 2665.82 points, with a decline of 1.66% over the past month, 0.39% over the past three months, and 3.40% year-to-date [1] - The CSI 300 Index categorizes its 300 sample stocks into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, providing analytical tools for investors [1] - The CSI 300 Power Index's top ten holdings include: Changjiang Electric Power (48.42%), China Nuclear Power (10.51%), Three Gorges Energy (8.64%), Guodian Power (5.78%), State Power Investment (5.27%), Huaneng International (4.62%), Chuanwei Energy (4.29%), China General Nuclear Power (4.1%), Zhejiang Energy (2.91%), and Huadian International (2.77%) [1] Group 2 - The industry composition of the CSI 300 Power Index shows that hydropower accounts for 60.31%, thermal power for 16.08%, nuclear power for 14.61%, and wind power for 9.00% [2] - The index sample is adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - In the event of special occurrences affecting a sample company's industry classification, the CSI 300 Industry Index samples will be adjusted accordingly [2]