Changying Tong: Abnormal fluctuations in stock trading do not involve any undisclosed material information that should be disclosed.

Changying Tong announced that the company's A-shares experienced an abnormal fluctuation in stock trading, with the cumulative closing price change deviation exceeding 30% over three consecutive trading days on August 12, August 13, and August 14, 2026. After self-examination and verification with the controlling shareholder and actual controller, the company stated that its production and operations are normal as of the announcement date, and there are no significant matters that should be disclosed but have not been disclosed. In addition, the revenue contribution from the company's polarization-maintaining fiber optic business is less than 1%, and there are few orders in the telecommunications sector. The performance targets reported by some media for the subsidiaries are not confirmed data by the company. The company reminds investors to be aware of the risks associated with stock price fluctuations.