Whether it's a leak or a property, who knows?

Waterproof warranty for 5 years and pipeline for 2 years. During the warranty period, the developer is not responsible. If not handled, you can complain to the local quality supervision department. They specialize in this matter, and then you can't go to court, or you will be responsible for delaying the warranty period! In addition, if the same place is not repaired twice during the warranty period, you can find someone to repair it yourself, and the cost will be borne by the developer. The roof is public. After the warranty period, minor repairs should be shared between the upper and lower floors. If you can apply for maintenance fund for overhaul, it goes without saying that you can't apply, but it is also shared by the upper and lower levels.