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I can't see clearly, like a jumping worm, I will jump when I encounter danger, you can check the encyclopedia to confirm.
There are fancy tiles on the walls of the hotel bathroom, or stickers.
In general, it is caused by water seepage upstairs, and the upstairs residents need to redo the waterproofing layer.
If you want the socket to be grounded, you can connect to the main reinforcement in the wall, not just any reinforcement can be connected, you need the main reinforcement; >>>More
appearedThe problem should be caused by your home >>>More
Your walls may have used the wrong waterproofing material, and your waterproofing master is a novice? What are your materials? Normal walls should be painted with waterproof mortar, taking into account waterproofing and tiling. The waterproof mortar brushed out is concave and convex surface, which is conducive to tiling and is not easy to hollow and fall off.