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This is normal.
The management scope of property services is within the red line of the community and outside the entrance door of the owner. So, your indoor part is your own problem. If the indoor toilet belongs to the property company, how can there be so many professional institutions for pipe dredging in the market.
Tell the property management that it is best to share it equally among all users.
The water pipe should be soundproofed, and the flushing frequency will increase, which will affect the rest of the bedroom.
It's all done in this way, and if you do a good job of waterproofing, it's no problem.
The Housing Authority has a special complaint about the property, which is a public toilet, and they don't have the right to sell it!
Important alarm, don't forget it.