Longjingyuan (formerly Kunshan Chengqi, established in 2006) is an innovative technology enterprise integrating research and development, manufacturing, sales, and service. The company specializes in the production and sale of low-temperature evaporators, electrostatic oil purifiers, oil–water separators, centralized fluid supply systems, and grinding‑fluid purification equipment. Since its inception, Longjingyuan has adhered to a business philosophy centered on "quality, integrity, environmental protection, service, and innovation." Leveraging a team of highly experienced professionals, the company designs and manufactures tailored solutions for diverse production lines, including separation and filtration, oil removal, chip evacuation, and centralized waste‑liquid filtration, while also providing complementary filter consumables and comprehensive filtration‑related technical services.