Huawei's replacement 1 maintenance materials refer to Huawei's replacement 1 maintenance materials usually refer to the replacement of faulty or damaged hardware components or accessories with brand-new first-class materials during maintenance services. When Huawei's products need to be repaired, technicians will check and confirm the parts that need to be replaced, and then replace the faulty parts with new materials provided by the original factory. These brand-new materials are usually called "1 grade materials", which means that they are genuine parts authorized by Huawei and have passed quality inspection.