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The other party does not need to compensate, but you need to compensate for the broken door, which is a public facility, and if you kick it out, it is a damage.
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No compensation, because the way you handled the problem was too rough.
Of course, it's illegal, even if it's not your private, even if it's public, he can't move away casually, let alone your private, if you know who moved out, you can explain the situation to him and ask him to plan, of course, you can also take legal means to call the police to protect your personal rights and interests.
Generally, you can take out the lock cylinder by disassembling the door handle, and pay attention to the inside and outside handles.
If the balcony floats out, its reinforcement is based on daily use, so if you want to change it to a kitchen, it may crack and will not collapse instantly.
Find a developer to ask for a building design drawing, and see how much load is available when designing.
It is recommended to change the covers on both sides, you can not change the lock, the hot melt adhesive can not be glued, that is, it is glued, and it is also a problem to repair it in the future.