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In fact, it is nothing, that is, a hole with a diameter of 12 mm, and it is enough to plug it with cement mortar.
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Find a solution upstairs! Otherwise, it will affect your life in the future!
It's all upstairs neighbors, just let the downstairs help you fix it, because he also has no intention of breaking it.
Quite possibly!
Because the keel has to drive into the expansion screw. >>>More
You can refuse them to enter your home, although the house is rented, but you have the right to use the house, you have the right to refuse to enter without your permission, if someone forcibly enters, you can choose to call the police.
This kind of matter is difficult to solve individually, so you can only go to the neighborhood office, reflect the specific situation, and rely on the government to solve it.
Negotiate with the downstairs first, if it doesn't work, find a property, or you can also pretend to be one.