Rebellion on the second floor. I live on the ninth floor, and I am not at home. How can I get evidence?

If you are not at home, you can take the following steps to obtain evidence:

1. Collect evidence: you can contact the property management office or the owners' committee to find out the situation on the second floor and ask them to record the situation. They can provide photos, videos or other evidence.

2. Contact relevant personnel: You can contact other personnel related to the property, such as architects, engineers or contractors, to find out whether the property has waterproof problems.

3. Get professional advice: If you think the property is waterproof, you can contact professionals, such as house inspectors or engineers, for professional advice.

4. Keep evidence: Once you have collected enough evidence, you should keep it well. Can be stored in a safe place, such as cloud storage or mailbox.

Please note that the process of obtaining evidence may be complicated, and I suggest you seek legal advice.