开封城墙

The main body of the existing city wall belongs to the Ming and Qing Dynasties. It is a layer of the city that was repeatedly buried and rebuilt after the Yellow River floods. Gates, walls and archaeological evidence illustrate how later defensive structures were superimposed on earlier capital layers. A short walk will help you understand the "city on top of the city", but it cannot be directly called the original city wall of Tokyo City in the Northern Song Dynasty.