When I retrieved it before, I thought that the ancient city wall of Shanghai refers to the foundation at the Renmin intersection of Luxiangyuan Road. Looking at the picture, I found that it was Dajingge. This section is indeed the last part of Shanghai's existing relatively complete city wall, from the bricks can see many traces of repair in the late Qing Dynasty. Shanghai's ancient city wall was 9 miles long, but because it was built by the people, it is incomparable with that of Nanjing and Xi'an.