In order to protect the pre-laid pipeline, the cement mortar should adopt a low water cement ratio of 1: 2.5— 1: 3. It's better to add less water, and it's easier to wipe it by hand. Too much water will reduce the strength. Generally, you put it on as soon as you hit it, and you don't need secondary leveling. After a week of maintenance, the concrete floor of the embryo house was formed and submitted to the city for inspection. You can make floor tiles or wooden floors on it.