As of the midday break on July 17, 2026, all three major A-share indices experienced a collective decline. The Shanghai Composite Index dropped by 1.64%, the Shenzhen Component Index plummeted by 3.7%, and the ChiNext Index saw a significant fall of 4.71%. In terms of sector performance, the optical module and semiconductor sectors witnessed substantial downturns. Demingli and Topsun Precision reached their daily downward limits, Changguang Huaxin was on the verge of hitting its limit, while Yuange Technology, Zhongji Innolight, and TFC Communication all fell by more than 10%. CRO concept stocks also fared poorly, with Bioscien, Kanghui, and Joinn Laboratories hitting their daily downward limits. However, power stocks defied the overall trend and strengthened, with Guiguan Electric Power and Leshan Electric Power reaching their daily upward limits. When it comes to individual stocks, nearly 4,400 stocks across the entire market experienced declines. (Note: In the Chinese stock market context, when the majority of stocks decline, it is commonly described as stocks "turning red" in terms of price drop indicators, which is a unique cultural expression in financial reporting here.)