The ground leveling should be based on the location of the floor drain, which is at the lowest point of the ground drainage slope; the floor drain should be painted tightly to ensure no leakage around it; the floor drain should be installed with a ground water storage test to check whether there is leakage around the floor drain; It is 5 mm below the ground to ensure that the drainage of the floor drain is smooth and there is no water on the ground.
