HANGZHOU, China, April 22, 2026 - Heshun Technology Co., Ltd. (301237.SZ) announced today that the trial production of its 350-ton-per-year M-Class carbon fiber project, invested in and constructed by its holding subsidiary Hexing Carbon Fiber, has been successfully carried out across the entire production process - including polymerization, spinning, and carbonization.

The core product of this trial production is HM40J (M40J grade), featuring a tensile strength of ≥4,400 MPa and a tensile modulus of ≥377 GPa. According to tests conducted by a nationally accredited carbon fiber testing authority, all performance indicators meet international standards. This achievement confirms that Heshun Technology has mastered the dry-jet wet-spinning process, laying a solid foundation for the project’s high-performance product positioning. It also fully validates the stability of the production process and the reliability of product quality.

The successful trial production indicates that the project's most critical and technologically challenging processes-polymerization, spinning, and carbonization-have been overcome, achieving full-process integration. This milestone represents a significant step in the company’s strategic layout in the carbon fiber sector and will have a positive and far-reaching impact on further optimizing Heshun Technology's carbon fiber industry chain, strengthening its core competitive advantages, and expanding into the high-end advanced materials market.

About Heshun Technology Co., Ltd.

Heshun Technology (301237.SZ) is a publicly listed company focused on the research, development, and production of advanced materials. Through its holding subsidiary Hexing Carbon Fiber, the company is strategically expanding its presence in the high-performance carbon fiber industry.