On September 26, Wanwei Updated High-Tech Material Industry (600063.SH) stated on the investor interaction platform that the company currently has two PVA optical film production lines, with a nominal capacity of 1200 square meters per year, and actual capacity of approximately 10 million square meters per year. With the increase in production, improvement in quality, and development of multiple varieties, market recognition and satisfaction continue to increase. At present, the main factor affecting the gross margin of PVA optical film products is depreciation of fixed assets.