Shandong Feilong Instrument Co., Ltd. is a high-tech enterprise recognized by the state. It is a modern high-tech enterprise engaged in the research and development, manufacturing, and sales of flow meters, as well as industrial automation network control and instrument sets. It is one of the first domestic enterprises to develop and produce vortex flowmeters. In 1999, Feilong Instrument became the first automation instrument production enterprise in Shandong Province to pass the ISO9002 quality management system certification. In 2002, the company passed the ISO9001:2000 international quality system certification. In 2009, the company passed the ISO9001:2008 international quality system certification. Since its establishment in 1986, the company has been adhering to the principles of integrity, responsibility, standardized innovation, and collaborative dedication, continuously consolidating its foundation, and committed to product technology innovation, quality control, and professional calibration, achieving significant development. The registered capital of the company is 50 million yuan, covering an area of 20000 square meters, with nearly 200 employees, including 30 middle and senior management personnel and 55 engineering and technical personnel. It has now developed into a large high-tech enterprise with multiple branches including Shandong Feilong Instrument Co., Ltd., Jinan Branch, Northeast Branch, Beijing Branch, Henan Office, Shaanxi Office, Inner Mongolia Office, etc. The company collaborates with research institutes such as Tsinghua University, Shandong University, Liaoning Institute of Metrology, and Northeastern University to continuously overcome technical challenges, improve and innovate products, and develop products that meet different user needs; And established multiple sets of flow measurement devices that have been certified as qualified by the National Academy of Metrology, including one set of high-precision gas flow standard device and two sets of high-precision water calibration devices. The company was once authorized by the Shandong Provincial Bureau of Quality and Technical Supervision as the Shandong Province Vortex Flow Meter Calibration Station. The company mainly produces and operates a series of products including tower flow meters, vortex flow meters, electromagnetic flow meters, ultrasonic flow meters, wedge flow meters, orifice flow meters, nozzle flow meters, turbine flow meters, capacitive pressure differential pressure transmitters, energy metering management systems, heat meters, etc. In 2003, the company introduced the new generation of differential pressure flowmeter - V-cone flowmeter from American company Mc Crometer, and developed six patented technology products with independent Chinese property rights - tower flowmeter based on the many superior performance of the original V-cone flowmeter. In 2004, we obtained the production license for heat meters and produced the mechanical FLK heat meter series products. In 2010, we produced the ultrasonic FLU heat meter series products and completed the research and development of heat meter reading and heating network monitoring platform software in the same year.