China-focused AI hardware and related optical stock prices fall after reports say the United States is weighing restrictions on imports of Chinese components used in data centers. Investing.com and Yahoo News both report declines tied to market reaction to the same type of development: a possible U.S. ban or import limitations affecting hardware supply chains. In the reports, the concern centers on whether U.S. officials plan to restrict certain components supplied by Chinese companies, particularly those used in data-center equipment. The news prompts investors to reassess near-term revenue and manufacturing exposure for Chinese firms that provide AI infrastructure and optics linked to data center buildouts. While the coverage emphasizes the potential impact of the proposed measures, it does not indicate final policy decisions or specific implementation dates within the provided excerpts. Overall, the articles describe a broad selloff in China AI-related hardware names following the prospect of tightened U.S. import rules.