Cheng Dongxun and SDI Company's Quality Department Director Liu Shan and Purchasing Department Director Yuan Hao etc. conducted careful and careful review on the company's production part approval process (PPAP), quality system audit (QSA), and quality process audit (QPA). After 3 days of data review and on-site inspection, I think that the preparation is more satisfactory than the previous first review, and the results are satisfactory. I also pointed out the non-conformities in the management curve, raw material management, quality management period, etc. Further continuous improvement, and through this to improve the company's quality management system, promote the improvement of product quality level, and ensure that Samsung SDI company provides high-quality electronic-grade NMP products.