Generally speaking, it was a crime to change the age of a cadre's file to a situation that did not match his real age. This was because the personal information in the cadre file should be true and accurate, including basic information such as age. If this information was tampered with, it would have a negative impact on the promotion of the cadre, salary, and other aspects, and might even violate the law. In practice, if the age of a cadre's file was deliberately tampered with and caused serious consequences, it might constitute a crime. For example, if the age of a cadre's file was deliberately tampered with so that it did not conform to the true age and caused the cadre to be incompetent or suffer from adverse effects, it might constitute a crime. It should be noted that altering the age of a cadre's file is a serious crime. If it is carried out by criminals, it must be actively investigated and cracked down. At the same time, it is very important for the officials to maintain the authenticity and accuracy of the personal information in the files. Any individual and organization should strictly abide by the relevant laws and regulations of file management.