My home is on the third floor, and my neighbor added an iron gate property similar to a security door in front of the partition door, saying that it would be harmful to me if my neighbor upstairs agre

My home is on the third floor, and my neighbor added an iron gate property similar to a security door in front of the partition door, saying that it would be harmful to me if my neighbor upstairs agreed to sign my name, otherwise it would be demolished. That must be approved by the upstairs owner before installation. After all, it belongs to public places! The upstairs owner does not agree that the property must be demolished! Your signature has nothing to do with you! It just means that you agree with the installation of the next-door neighbor. You didn't advocate the first security door, nor did you install it together! Unless it says that if anything goes wrong, you will bear it together. If there is, I don't think you will sign it! So there is no responsibility!