When regimes change, rulers often hope to use historical records to consolidate their legitimacy and moral superiority, thus being motivated to selectively record, delete, or even rewrite historical materials. The following are some types and examples of records that are often discussed and questioned by scholars and may have been tampered with for political purposes. However, it should be noted that such issues are often complex and controversial, and the specific situation needs to be identified and studied in combination with archaeological materials, comparison of different texts, and multiple historical materials: 1. Records in official history and chronicle-style history books In the traditional Chinese historiography system, official history (such as "Records of the Grand Historian", "Book of Han", "Book of the Later Han", "History of Song", etc.) is often compiled by the court or official institutions. After the new regime came to power, in order to highlight legitimacy and "orthodoxy", it often portrayed the policies, monarchical behavior, and historical events of the previous dynasty in a negative way, while exalting the achievements and virtues of the current dynasty. For example, in the early days of the Han Dynasty, historical books might weaken the systematicity and complexity of the Qin Dynasty's tyranny, and use the Han Dynasty's benevolent governance and moral governance as important arguments for legitimacy; similar techniques are also reflected in the history books of later dynasties. 2. Deletion and reconstruction in historical compilation Since historians were constrained by the political environment and ideology of the time when compiling history, many historical materials about the failures of the previous dynasty, the suffering of the people, and political turmoil may be downplayed or obscure. On the contrary, examples that are beneficial to the ruling image of the new dynasty will be recorded in detail, argued, and even given a commendatory color in moral evaluation. As a chronological history book, "Zizhi Tongjian" is often considered to have obvious political and moral judgments when interpreting and summarizing historical experience. Its characterization of certain events and evaluation of characters may partially reflect the author's political orientation and concept of governing the country. 3. Selection of local chronicles and folk records In addition to official history, local chronicles, family trees, and folk legends may also have political influence in the eyes of the court. In order to prevent local forces or specific groups from using these records to confront the central government, the new regime often reviews, modifies or supplements these materials to make them consistent with the official historical narrative. For example, records of major events such as local uprisings and civil unrest are often organized in official documents in an attempt to create a historical logic of "clear distinction between good and evil". 4. Reshaping the image of specific figures or events During historical transitions, the deeds and images of key figures are often easily tampered with. For example, the image of a monarch or important minister of the previous dynasty may be deliberately belittled in order to highlight the "orthodox succession" of the new dynasty; similarly, the historical deeds of generals and ministers who are relied on by the new regime may be exaggerated or even beautified in order to construct a narrative model of political legitimization and sanctification. In general, official history books and other records of successive dynasties often have a certain political color in the context of the succession of emperors. When studying these historical materials, modern academics will try to restore a more objective and complex historical picture by comparing different versions, excavating archaeological discoveries, and paying attention to the ideas of historical compilation. Therefore, when we read these records, we also need to maintain critical thinking and refer to multiple historical materials and perspectives to understand historical events more comprehensively.