Haiyang Qiheng Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in the design, research and development, production, sales and service of various environmental monitoring related products such as water quality, dust, laboratory analysis instruments and meters, as well as a "specialized, refined and innovative" enterprise in Yantai City. The company currently covers dozens of models in four major categories: water quality detectors, water quality automatic samplers, dust concentration detectors, and portable open channel flow meters. Since its establishment, the company has taken strict production processes, rigorous quality control, thoughtful customer service, and professional research and development capabilities as the foundation of its development. It has successively passed ISO9001 quality management system, ISO14001 environmental management system, and ISO45001 occupational health and safety management system certification; At the same time, the company continuously carries out technological innovation and product function upgrades, and has obtained more than 50 computer software copyrights, design patents, utility model patents, and invention patents. Among them, the "Intelligent BOD Measurement Analyzer" and "COD Rapid Measurement Instrument" have obtained the national metrological instrument type approval certificate, and the "Portable Water Quality Automatic Sampler" and "Portable Open Channel Flow Meter" have obtained the metrological evaluation certificate issued by the Chinese Academy of Metrology; The company's products have been verified and certified multiple times by professional calibration institutions such as the China Institute of Metrology, Shandong Institute of Metrology, Qingdao Institute of Metrology Technology, and Guangzhou Institute of Metrology and Testing Technology. Obtaining this series of qualifications and honors is not only a reflection of Qiheng Environmental Protection's emphasis on technology and innovation, but also a sign of the company's high-quality and steady development. It is also the fundamental quality assurance we provide to our customers. The company currently has independent technology research and development and production sites, with technology and R&D personnel accounting for one-third of the total number of employees. It can independently design and develop product software and hardware, and all products under its umbrella are independently designed and developed with independent intellectual property rights. The numerous composite innovative talents engaged in technological innovation research in enterprises provide strong technical and innovation support for the company's development, and also inject a continuous stream of strong momentum into the company. In the future, Qiheng Environmental Protection will continue to adhere to the principle of common development with society and the environment, pragmatically seek change, adjust structure to promote development, and contribute to the clear waters and blue sky of our motherland.