强力新材(300429.SZ)：公司的光敏性聚酰亚胺（PSPI）仍处于下游客户验证阶段

Group 1 - The core viewpoint of the article is that Strongly New Materials (300429.SZ) is currently in the process of customer validation for its photosensitive polyimide (PSPI), and the work is progressing normally [1] Group 2 - The company has communicated with investors through an interactive platform regarding the status of its PSPI product [1] - The validation phase indicates that the product is being tested by downstream customers, which is a critical step before full-scale commercialization [1] - The ongoing progress suggests that the company is actively working to meet customer requirements and expectations [1]