The roads in Akun are designed according to the ordinary drainage gradient, but when it comes to rainy weather, it is completely paralyzed! Not only roads, but also paved squares exist in varying degrees. Personally, I think that if the pavement of roads and squares is improved into materials with certain water seepage and water absorption, it can be better improved, instead of just draining water, because the drainage slope is limited and the water leakage can't be much bigger!