Group 1 - The Shanghai Modern Agriculture Theme Index closed at 1378.67 points, with a 2.37% increase over the past month, a 2.90% decrease over the past three months, and a 2.90% decline year-to-date [1] - The index comprises 30 listed companies involved in various sectors such as agricultural products, seed industry, feed, animal health and breeding, livestock products, fishery products, and agricultural machinery [1] - The top ten weighted companies in the index include Meihua Biological (15.84%), Beidahuang (8.53%), Hainan Rubber (7.42%), and others, with the Shanghai Stock Exchange accounting for 100% of the index holdings [1] Group 2 - The industry composition of the index shows that agricultural products account for 33.29%, feed for 28.95%, animal health and breeding for 15.05%, livestock products for 9.97%, seed industry for 6.06%, agricultural machinery for 3.50%, and fishery products for 3.19% [2] - The index samples are 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 special circumstances allowing for temporary adjustments [2]