濮阳惠成：公司有光刻胶中间体研发项目持续研发中，但其收入占公司总体业务收入比重较低

Core Viewpoint - Puyang Huicheng (300481.SZ) is primarily engaged in the research, production, and sales of fine chemicals, including anhydride derivatives and functional material intermediates, with ongoing R&D projects for photoresist intermediates [2] Group 1 - The revenue from the photoresist intermediate R&D project is currently low and does not significantly impact the overall business revenue of the company [2] - The company sources all of its main raw materials domestically [2]