If you don't use it for the first two days, just cover it with straw or sacks to prevent cracking and freezing (it takes 12 hours for the initial setting of cement, and it takes 24 hours to get strength, so watering it too early is not good); The weather is too hot, pay attention to the change of cement color (if it turns white, spray it and wet it). Look at the weather after 2 days: it is too hot, 3 times in the morning, 3 times in the middle and 3 times in the evening (6 am, 10~ 1 1, 6~8 pm). If it is not hot, 2 times is enough. Mainly to check the change of cement color; Dry quickly and water frequently.