During the prosperous Tang Dynasty, Wei warned Emperor Taizong that "taking history as a mirror, we can know the rise and fall". History can't speak, and her silence is her value. People or nations who are good at reflection can understand the law of ZTE in the process of historical rise and fall, so that the future history of the country and nation will develop healthily and avoid being brought into danger and self-control. The prosperity of the Tang Dynasty is inseparable from Yang Di's reference and criticism. The repetition of history seems to be a lingering nightmare, which has long troubled and troubled future generations. Countless history books record the gains and losses of the present or the previous dynasty. One is to record the history of a country, and the other is to leave complete clues for later rulers and people. Sometimes history is just forgotten, and smart and persistent people jump out and say, "All history is contemporary history." Indeed, comparing Chinese and foreign history horizontally and examining the national route vertically, we find that history is strikingly similar.

Luo often said: "If you are divided for a long time, you will be combined." Don't you see, the rise and fall of a dynasty always alternate. After the prosperous times, there will be troubled times, and after the troubled times, there will be rectification. Somehow, it conforms to China's theory of Yin and Yang. History can be used as a reference for politicians, but it can only be a reference. The wheel of history will never stop, all we can do is try our best! Try to delay that day. ...