How to deal with the leakage of the bathroom ceiling?

First, can I claim compensation for the loss of my ceiling if it is the water leakage caused by the quality problem of the house? Looking for a property or a developer?

You can claim compensation, provided that it is caused by the developer. Just look for the property, because this kind of minor maintenance problem is entrusted to the property by the developer.

2. If it is not the quality problem but the personal reasons of the upstairs residents that lead to water leakage, how to claim compensation?

If there is definite evidence that the waterproof layer upstairs was damaged during the renovation, then you can contact the property and ask the upstairs residents to compensate you for your losses.

3. What is the scope of compensation that can be claimed? In addition to property losses, can you ask the responsible party to compensate for personal lost time?

The lost time fee is difficult to define, and most of it is decided by the court. Generally speaking, according to the average income of your district in that year, it is very low. Be tolerant and generous, if the property can really solve this problem with you, that would be great.