Group 1 - The Shanghai Midstream Industry Index rose by 0.39% to 2851.61 points, with a trading volume of 87.133 billion yuan [1] - Over the past month, the Shanghai Midstream Industry Index has decreased by 1.31%, down 8.06% over the last three months, and down 4.06% year-to-date [1] - The index is composed of three parts: the upstream, midstream, and downstream industry indices, reflecting the overall performance of related listed companies in the Shanghai market [1] Group 2 - The top ten weighted stocks in the Shanghai Midstream Industry Index include: SMIC (3.23%), Haiguang Information (2.48%), Cambricon (2.36%), China State Construction (2.34%), Sany Heavy Industry (2.11%), Weir Shares (2.1%), COSCO Shipping Holdings (2.03%), Wanhua Chemical (2.0%), Zhongke Shuguang (1.96%), and Fuyao Glass (1.8%) [1] - The index's holdings are entirely composed of stocks listed on the Shanghai Stock Exchange, with a 100% allocation [1] Group 3 - The industry composition of the index shows that 46.09% is in industrials, 36.38% in information technology, 10.18% in materials, 5.30% in consumer discretionary, and 2.06% in communication services [2] - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [2] - In special circumstances, the index may undergo temporary adjustments, including the removal of companies that are delisted or undergo mergers, acquisitions, or spin-offs [2]