Huaan Securities released a research report on April 14 stating that it gave Dinglong Co., Ltd. (300054.SZ) a purchase rating. The main reasons for the rating include: 1) the increase in R&D investment, compounded by exchange rate fluctuations, which had an impact on the company's profit in 23 years; 2) CMP polishing pads recovered well, and the release of CMP polishing liquid and cleaning liquid progressed smoothly; 3) sales of semiconductor display materials increased significantly, and the high-end wafer photoresist business progressed rapidly. (Mainichi Keizai Shimbun)