YOFC (06869) announced that its A-share stock recorded cumulative closing price deviations exceeding 20% over three consecutive trading sessions from March 24, 2026, to March 26, 2026. This constitutes abnormal trading volatility under the relevant regulations of the Shanghai Stock Exchange. Following internal review and confirmation from its largest shareholder, China Huaxin Post & Telecommunication Economy Development Center, the company confirmed that as of the announcement date, there is no material information requiring disclosure that has not been made public. The company noted recent market attention on price fluctuations of single-mode fiber optic cable products and growing demand for new fiber products related to computing data centers. While supply and demand dynamics in domestic and international fiber optic cable markets have shown some improvement, the impact of short-term price changes for certain products on the company’s future performance will depend on market conditions and business developments. New fiber products used within and between data centers currently represent a small portion of the global market demand. Investors are advised to carefully assess risks and make prudent investment decisions.