YOFC has announced that its A-share stock experienced cumulative closing price deviations exceeding 20% over three consecutive trading days from June 2, 2026, to June 4, 2026. This constitutes a situation of abnormal stock trading volatility according to the relevant regulations of the Shanghai Stock Exchange.

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

The company's daily operations are currently normal, and no significant changes have occurred in the industry environment.

The company notes that recent market attention on price fluctuations for optical fiber and cable products and data center-related demand is high. Currently, with the continued acceleration of data center construction both domestically and internationally, the supply-demand dynamics in the optical fiber and cable market are improving.

However, the extent of price fluctuations for certain products remains uncertain. The impact of these fluctuations on the company's performance requires comprehensive assessment based on the market environment and the company's business structure. The company advises investors to be mindful of investment risks, make rational decisions, and invest prudently.