You can't believe it all, and you can't believe it. After all, there are very few people like Sima Qian who have the backbone to write historical records. Ancient history was generally written at that time to beautify the royal family and avoid suspicion: either there were some former dynasties in the later dynasties, and the information may be incomplete, such as the Three Kingdoms, which often obeyed the needs of rulers, such as portraits of emperors. Later generations may often be covered up by their great achievements or infamous deeds for thousands of years, such as.