One of the problems was that, since the terrain was high in the southeast and low in the northwest, the drain from the southeast part including filth flows into the area around the Imperial Palace; also there were neither walls that surrounded the capital nor front gate.
問題点の一つは、南東が高く北西が低い地形は、汚物を含む東南部からの排水が宮の周辺を流れることであり、また、都を囲む城壁や正門が存在しなかった。