Dongguan Qingrui Technology Co., Ltd., founded in 2019, only focuses on foil air bearings. It is a scientific and technological enterprise with independent design and development, manufacturing, testing and verification, and technical service capabilities. For 7kw-50kw air compressors in the field of fuel cell air compressors, we have developed a number of series of foil air bearings. Through continuous optimization of process, detection and testing technology, we have solved the problem of foil air bearing consistency, sold more than 2000 sets, and passed the start and stop, durability, vibration and other tests of many customers. At the same time, the products are widely used in air suspension centrifugal blower, aircraft environmental control system, refrigeration and other fields;