36Kr learned that the three major A-share indices collectively fell during the midday break, with the Shanghai Composite Index down 0.64%, the Shenzhen Component Index down 1.35%, and the ChiNext Index down 1.67%; the engineering machinery, aerospace and military industry, and power generation equipment sectors led the decline, with Xugong Machinery down over 7%, Aerospace Technology down over 5%, and Dongfang Electric down over 3%; the coal, chemical fiber, and oil and gas sectors saw the largest gains, with YANKUANG ENERGY and Jilin Chemical Fiber hitting the daily limit, and Guanghui Energy up over 8%