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The wood seems to be so high, so if you don't have it, find a carpenter to make it out of wood, the wood is better.
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Make one yourself, then apply paint, material to pour sand and cement.
To see the area of the door consumables specific profit is not.
Note a thing: do a good job of waterproofing! The rest will not be repeated. If you don't know, please talk to each other.
It is a equipotential terminal box.
To put it simply, the function is to check all the metal objects that can be seen or not seen in the bathroom, as long as the human body can touch, all of them are connected to the inside through wires, and are connected to the copper bar inside to form an equipotential to prevent accidental electric shock. >>>More
If the bathroom is large enough, of course, it can be designed in this way, which can do a good job of separating dry and wet, and it will also be tall and practical.
That's the ground interface, and it's okay if it's blocked.