Wavelength Optoelectronics: There have been no significant changes in the company's operations and internal and external environment.

Wavelength Optoelectronics announced that the company's stock has increased by 48.17% over the course of three consecutive trading days from 2025-09-17 to 2025-09-19, triggering an abnormal volatility announcement. The company's self-examination confirmed that there were no significant undisclosed matters that should have been disclosed, and the controlling shareholder and actual controller did not buy or sell company stock during the relevant period. There have been no significant changes in the company's business operations or internal and external environment.