Recently, several core technological breakthroughs have emerged in the field of high-end OLED intermediates, including key achievements such as the R&D of new carbazole derivatives and the industrialization of deuterated compound technology. The new carbazole derivatives realize efficient bipolar carrier transport through a unique fused structure, and with their high triplet energy level characteristics, they can significantly reduce the driving voltage of OLED devices and improve luminous efficiency; deuterated compounds further enhance the thermal stability and luminous performance of materials through deuterium atom substitution technology. Relevant products adopt high-selectivity synthetic routes with impurity control reaching ppm level, and their performance such as high triplet energy level and high glass transition temperature can meet the requirements of high-end OLED devices, which has provided core material support for high-end products such as smartphone panels. Meanwhile, the technology in this field shares synthetic processes and quality control systems with photoresist resin technology, achieving a synergistic effect of 40% improvement in R&D efficiency.