双欣环保：公司生产的DMC及相关产品已经过锂电池上游电解液生产企业认证并进入其供应链

Group 1 - The core point of the article is that Shuangxin Environmental has clarified that it does not produce NMP, but its DMC and related products have been certified by upstream electrolyte production companies in the lithium battery supply chain [2][3] - An investor inquired whether Shuangxin Environmental's product NMP has been certified by Ningde Times and entered its supply chain [2] - The company expressed gratitude for the investor's interest in their products [2]