飞凯材料：公司在光纤光缆涂覆材料领域深耕多年，目前在国内市场中保持较高的占有率

Group 1 - The company, Feikai Materials, has a strong presence in the optical communication sector, particularly in the production and research of UV curing materials [2] - The company has maintained a high market share in the domestic market for optical fiber and cable coating materials, leveraging its technological advantages and market experience [2] - The company's customer base includes major domestic and international optical fiber and cable manufacturers, indicating significant influence within the industry chain [2] Group 2 - The market for hollow-core optical fibers has not yet seen large-scale industrial application, which currently has a minimal impact on the sales of the company's optical fiber coating materials [2]