Sunda gate, which is on the same old map, is a special flood discharge gate. Its style is the same as the iron fence gate in the south of Baotu Spring, and the next figure is the "Nanguan iron grate gate" at the gully.
the map has the south gate gate (present place name), in addition to this, it also marks "the gate of the southeast polder", that is, "Yong Gu gate", also commonly known as the "East house door". Its specific location is today in the north of Shandong News Building and on the south of Shandong grain building.
[b] map [/b]