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On October 19, Ningbo Juhua Chemical Technology Co., Ltd.’s 150,000 tons per year PDO/PTT integrated production facility began operations successfully, producing the first batch of qualified products; this marked a successful commissioning from the very first attempt. The successful operation of this project signifies that China has broken the long-standing foreign technological monopoly in the field of polyester new materials. PTT is known as the \"king of polyesters\"; thanks to its excellent resilience, dyeing properties, and environmental-friendly characteristics, it is widely used in key industries such as high-end textiles and engineering plastics. The facility constructed by Ningbo Juhua is the world’s largest single-unit PDO/PTT integrated production facility. It is understood that Ningbo Juhua, in collaboration with the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences and Shanghai Huanyu Engineering Co., Ltd., has, through years of dedicated research, developed an engineered multiphase catalytic process for the hydroformylation of ethylene, achieving the world’s first industrial application of single-atom catalysts. The project employs advanced chemical processes, and by introducing, digesting, absorbing, and re-innovating these technologies, it has successfully overcome technical barriers. Compared to the internationally dominant biological methods, this technology boasts significant advantages in terms of process stability and raw material supply security. It not only eliminates reliance on foreign technologies but also establishes an efficient, closed-loop circular production system covering the entire process.