According to historical records, it was "patricide" who won the throne, but the history of the Sui Dynasty was written by the Tang Dynasty, and even posthumous title's "Yang" was given by the Tang Dynasty, so there is no way to verify the specific historical facts. Anyone who has really studied the history of the Tang Dynasty knows that the Tang Dynasty was a dynasty of rumors, and it was originally a group of sprayers. They sprayed and sprayed, feeling bored, and began to look for angles and play with creativity. Xianbei people take their mothers as their wives and their widows as their wives. If the relationship between Yang Guang and Mrs. Xuanhua was incest, it would not be so serious from the ethics at that time, and it would not be condemned by too much public opinion.
Anyway, after a long time, you can reverse black and white. Do you think Li Er became emperor? Jiangshan was shot down by himself, not usurping the throne of the Sui Dynasty. His political achievements are so outstanding. Is it necessary for him to discredit the former dynasty? I don't mean to rehabilitate, but during the reign of Yang Di, there were some achievements in fighting against foreigners and recovering territory. The Beijing-Hangzhou Grand Canal built by Yang Di was criticized by the world at that time, but it is still in use today. At that time, Li Shimin thought about how to take a look at how he treated Wei Zhi. When Wei Zhi was alive, he listened to everything. When Kevin·Z died, he almost gave up his grave. The terrible thing about this hypocrite is that he is still a villain. How dare you leave him? History will be rewritten by him, which will harm future generations, so how to write it. Defaming the former dynasty became a common problem of the rulers at that time, in order to let more people admit their legitimacy. So all the ridiculous things happened in the previous dynasty, so it is not surprising that he killed his father.