YOFC (06869) has issued an announcement regarding unusual fluctuations in its A-share trading. The company's stock experienced a cumulative deviation in closing prices exceeding 20% over two consecutive trading days from June 22, 2026, to June 23, 2026. According to relevant regulations of the Shanghai Stock Exchange, this constitutes an abnormal trading situation.

Following an internal review by the company and a written inquiry to its largest shareholder, China Huaxin Post & Telecommunication Economy Development Center Co., Ltd., it has been confirmed that, as of the date of this announcement, there is no material information that should have been disclosed but has not been.

The company acknowledges the heightened market attention on price fluctuations for optical fibers and cables used in artificial intelligence data centers. Currently, the global optical fiber and cable industry is in an upward cycle due to the continued acceleration of computing power infrastructure construction both domestically and internationally. However, there is uncertainty regarding the extent of price volatility for some products. The impact on the company's performance requires comprehensive assessment based on market conditions and the company's business structure. Investors are advised to be mindful of investment risks, make rational decisions, and invest prudently.