Group 1 - The Shanghai Composite Index opened lower and the CSI 300 Chemical Index reported 2064.08 points, with a decline of 7.57% in the last month, 6.98% in the last 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, providing a comprehensive analysis tool for investors [1] - The top ten weights in the CSI 300 Chemical Index are: Wanhua Chemical (23.08%), Salt Lake Industry (13.6%), Baofeng Energy (7.79%), Juhua Co. (7.6%), Hengli Petrochemical (7.22%), Satellite Chemical (6.88%), Hualu Hengsheng (6.64%), Zangge Mining (6.38%), Longbai Group (6.1%), and Rongsheng Petrochemical (5.49%) [1] Group 2 - In terms of industry composition within the CSI 300 Chemical Index, other chemical raw materials account for 39.09%, polyurethane for 23.08%, potassium fertilizer for 19.98%, fluorochemical for 7.60%, titanium dioxide for 6.10%, and organic silicon for 4.15% [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 samples or significant events affecting sample companies [2]

Group 1 - The Shanghai Composite Index opened lower and the CSI 300 Chemical Index reported 2080.97 points, with a decline of 8.46% in the past month, 4.44% in the past three months, and 6.01% 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, with a base date of December 31, 2004, and a base point of 1000.0 [1] - The top ten weights in the CSI 300 Chemical Index are: Wanhua Chemical (23.25%), Salt Lake Industry (13.52%), Baofeng Energy (7.58%), Juhua Co. (7.48%), Hengli Petrochemical (7.2%), Satellite Chemical (7.1%), Hualu Hengsheng (6.86%), Zangge Mining (6.26%), Longbai Group (6.04%), and Rongsheng Petrochemical (5.49%) [1] Group 2 - In terms of industry composition within the CSI 300 Chemical Index, other chemical raw materials account for 39.27%, polyurethane for 23.25%, potassium fertilizer for 19.79%, fluorochemical for 7.48%, titanium dioxide for 6.04%, and organic silicon for 4.17% [2] - The index sample is adjusted every six months, 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 when the CSI 300 Index sample is modified [2]

Group 1 - The A-share market's three major indices closed mixed, with the CSI 300 Chemical Index reported at 2019.69 points [1] - The CSI 300 Chemical Index has decreased by 12.44% over the past month, 9.26% over the past three months, and 8.77% 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 Chemical Index are: Wanhua Chemical (23.46%), Salt Lake Industry (14.15%), Baofeng Energy (7.49%), Juhua Co. (7.38%), Hengli Petrochemical (7.29%), Hualu Hengsheng (7.0%), Longbai Group (6.23%), Cangge Mining (6.23%), Satellite Chemical (5.96%), and Rongsheng Petrochemical (5.51%) [1] - The market share of the CSI 300 Chemical Index is 57.10% from the Shanghai Stock Exchange and 42.90% from the Shenzhen Stock Exchange [1] Group 3 - In terms of industry composition, other chemical raw materials account for 38.08%, polyurethane for 23.46%, potassium fertilizer for 20.38%, fluorochemical for 7.38%, titanium dioxide for 6.23%, and organic silicon for 4.47% [2] - The index sample is 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 when the CSI 300 Index samples are modified [2]