Retirement generally refers to soldiers (athletes) who have completed active service or left the army for other reasons, which is also commonly known as "retirement". Under the compulsory military service system, it means that soldiers stop serving after completing the reserve service, and active-duty officers who have reached the maximum age of completing the reserve service or are completely unable to serve due to injury and disability can directly retire from active service. After retiring, officers generally retain their original ranks. And add the word "retired" to the original rank title to show the difference. At present, it also refers to the termination of sports by competitive athletes due to age and physical reasons.