Group 1 - The Shanghai Electronic Index opened lower and reported at 5440.88 points, with a decline of 2.34% over the past month, 10.99% over the past three months, and 2.79% year-to-date [1] - The index includes 50 representative listed companies in the electronic sector on the Shanghai Stock Exchange, covering areas such as semiconductors, computer storage, and consumer electronics [1] - The top ten weighted companies in the index are: SMIC (9.12%), Haiguang Information (7.02%), Cambrian (6.66%), Weir Shares (5.93%), Zhongke Shuguang (5.53%), Lanke Technology (5.08%), Industrial Fulian (4.55%), Zhaoyi Innovation (4.52%), Zhongwei Company (4.16%), and Changdian Technology (2.54%) [1] Group 2 - The industry composition of the index shows that integrated circuits account for 59.71%, electronic terminals and components for 16.14%, semiconductor materials and equipment for 11.26%, electronic components for 4.54%, optoelectronics for 4.06%, discrete devices for 3.36%, and automotive parts and tires for 0.93% [2] - The index samples are adjusted every six months, with adjustments implemented on the next trading day following the second Friday of June and December [2] - Weight factors are generally fixed until the next scheduled adjustment, with special circumstances allowing for temporary adjustments [2]