Yongxin Optics (603297.SH): The optical components business related to lithography machines accounts for a small proportion of the company's revenue and is currently not the core business of the company.

Financial news from the Zhitong app: Yongxin Optics (603297.SH) has announced that the closing prices of the company's stock on September 16, September 17, and September 18, 2025, have shown a cumulative deviation of over 20%, indicating abnormal fluctuations in stock trading as stipulated in the Shanghai Stock Exchange trading rules.