YOFC(06869) A-share stock trading has abnormal fluctuations. Currently, the core optical fiber related business has not had a significant impact on the company's financial data.

YOFC (06869) announced that the closing price of the company's A shares has deviated more than 20% for three consecutive trading days from September 16, 2025 to September 18, 2025. According to the relevant provisions of the Shanghai Stock Exchange Trading Rules, this is considered abnormal stock trading volatility. On September 19, 2025, the company's A shares closed at the limit-up price. The stock price has been volatile recently, and investors are advised to pay attention to investment risks and make rational investment decisions. According to the company's self-inspection, as of the date of this announcement, there have been no significant changes in the company's main business, daily production and operation, and operating environment compared to the information previously disclosed. There are no significant matters that should have been disclosed but have not been disclosed by the company. The company has noticed the high attention to fiber optic cable products related to data center and especially to hollow core fiber optics in the market. Currently, fiber optic cable products related to data centers account for a small portion of the global demand, and the application of hollow core fiber optics is still in the early stage with no established scale of sales, stable price, or profit level. The future business development also depends on the further maturity of the industry chain. Currently, the hollow core fiber optic related business has not significantly impacted the company's financial data. Investors are advised to pay attention to investment risks, make rational decisions, and invest cautiously.