From Nanjing City Wall to Laomendong

As I know, the current well-preserved City Wall in the city covers around 23km. Which section are you referring to? Anyway, I can tell you the direction from the main entrance of the Taicheng Scenic Area of the Wall (Ming City Wall Relics Park). By bus, you can walk around 10min to East Beijing Road Jinxianghe Road bus stop to take bus no. 46 and get off at Gutongxiang station. Then walk south along the Gulongxiang Lane to Laomendong.