南大光电：宁波南大光电主要从事中高端光刻胶的研发和产业化，核心原材料由公司自主开发

Group 1 - The core viewpoint of the article revolves around the potential impact of stricter export approvals for photoresists from Japan on leading companies in the sector, such as Strongly New Materials and Jiu Ri New Materials [1] - The company, Nanda Optoelectronics, focuses on the research and industrialization of mid-to-high-end photoresists, specifically ArF and KrF photoresists, and is currently concentrating on product validation and process stability [1] - The core raw materials for the company's products are developed in-house, indicating a level of self-sufficiency in their supply chain [1]