The historic city in the impression seems to be surrounded by walls, surrounded by ancient cities, built in the Ming Dynasty in the Nanjing Ming Dynasty Wall, the most intact and can be cycled on a bicycle. The ancient city wall of Xi'an has the aura of the ancient capital of the Eight Dynasties. Kaifeng, in the history of a thousand years of construction, how to get the city building that is as strong as a rock. This ancient city wall, which was built in the Qing Dynasty and has a total length of 14.4 kilometers, has been listed as a national key cultural relics protection unit by the State Council. Although only 1.6 kilometers of the city wall is open to the outside world, most of it is still being repaired. However, due to its geographical location, it has been repeatedly invaded by floods in history. The whole city of Beijing has been inundated several times, and this ancient city has not been spared. It has been rebuilt many times, making it buried under the ancient city wall. The invisible five-storey city wall, therefore, Kaifeng is indeed a veritable city of the city. History smoke has faded, no need to worry about flooding. The wall is covered with green trees and red flowers. The tall and thick walls of the brick building are also more soft. From 2014, Kaifeng City Wall was also listed. In the "China Ming and Qing City Walls" application, I believe that in the near future, we can see the more complete ancient city features, and the ancient city gates that will be built one after another will return to the world's vision one by one. Walk the ancient city wall, like many locals coming and going, walking on the bricks, walking on the footsteps of the ancients, standing on the wall of the ancient city, watching the people who pass through the city, now no longer see Jin Ge Iron horse, with weapons in the era of the world.