The city wall of Nanjing has gone through more than 650 years of wind and frost. In these long years, although the city wall of the Ming Dynasty has experienced vicissitudes, it still preserves 25.1 kilometers of walls and gates. It is the longest surviving ancient city wall in the world. It is also because of its existence that makes Nanjing city unique and special. The last stop of wandering around Jinling will chosen to be here, let's go to Nanjing Ming City Wall for a walk!