万润股份：PEI材料已实现销售，年产能1500吨量产线现已投入试生产。

Group 1 - The core point of the article is that Wanrun Co., Ltd. has successfully achieved sales of PEI materials, indicating a positive development in their production capabilities [1] - The company has established a production line with an annual capacity of 1,500 tons, which is now in trial production [1]