The ancient city of Pingyao, with a history of more than 2,700 years, is one of the second batch of famous historical and cultural cities in China, and has a history of more than 600 years even if it was rebuilt in the early Ming Dynasty in 1370. Thanks to the 1977 flood, the brick wall saved the lives of 40,000 people in the city, and no one has advocated tearing down the wall since then. The city wall door mottled and scarred, probably because of the cumulative erosion, but also as if I could see that period of the intense scenes of military engagements, soldiers inside the wall kept throwing stones and waving knives, outside the walls of the warrior wave after wave of climbing courageous, for life, there is no battle is justice, we look at history, should not be heroes of success or failure.