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The question is clear, what's wrong with your bathroom? Is it a water leak or something else? If you don't say it, how will others know how to remedy it?
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The bathroom decoration ceiling is waterproof with Oupin aluminum gusset plate.
The problem of the wall.
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6 litres per minute for each bathroom, 54 litres for 9 bathrooms plus 2 litres for the kitchen, and 200 litres for more than two toilets at the same time, a 200 litre water tank is a must.
The design of the water outlet is unreasonable, and the ventilation pipe is not installed.
The problem of mirrors, the concave mirror will be small when the object is reflected, and the convex mirror will be round and large, it seems that the two mirrors in your house are not good plane mirrors! Also, distance can have a different effect!
Just turn one into a storage room.