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On January 13, 2025, the 72,400 Nm3/h (oxygen) air separation plant built by Sichuan Air Separation Equipment (Group) Co., Ltd., which included design, manufacturing, installation, and commissioning, was put into operation. Less than 24 hours after the expansion engine was started, it successfully produced oxygen and nitrogen of qualified quality; the purity of liquid oxygen was 99.92%, and the purity of liquid nitrogen (with an oxygen content of 1.3 ppm) exceeded the design specifications, resulting in a successful commissioning from the very first attempt. The 72,400 Nm3/h (oxygen) air separation unit of Xinji Energy is designed to support its 1.5 million tons per year production project of new type water-soluble compound fertilizers. This air separation unit employs an internal compression process for oxygen and nitrogen; its main cooler features a new, high-efficiency design, and it is equipped with high-pressure plate heat exchangers developed by Chuan Kong Group as well as high-flow medium-pressure expanders. Since the beginning of the project’s development, the Sichuan Airlines team has adhered to high standards and strict requirements in carrying out all tasks, exercising strict control at every stage—from product design, manufacturing, installation, to trial operation. The 9.9 MPa high-pressure plate heat exchangers used in New Ji Energy’s 72,400 Nm3/h (oxygen) air separation unit are equipped with new types of high-pressure corrugated fins developed independently by Sichuan Air Separation Group, in combination with efficient and low-resistance low-pressure corrugated fin technology. The performance parameters of these fins were all tested in the wind tunnel laboratory developed by Sichuan Air Separation Group; they feature high heat transfer efficiency and high pressure resistance, making them suitable for various high-pressure applications in industries such as chemicals, petroleum, and natural gas. At present, all systems of the entire air separation plant are operating very stably, producing qualified oxygen and nitrogen products successfully; this has enabled the achievement of key project milestones, earning unanimous recognition and praise from the customers. The successful one-time commissioning of this project reflects the persistent dedication and hard work of every member of the Xinji Energy team and the Chuan Kong team. It represents yet another significant model project that demonstrates Chuan Kong’s commitment to providing high-quality services to its customers, in line with the spirit of \"unity, integrity, and decisive success\".