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This is a tide insect, the scientific name is rat woman, likes a humid environment, try to keep the home dry, and use the general common aerosol insecticide.
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In the local dialect, this is called tide insects.
Your kitchen is too damp and dirty.
Let's do a good cleaning.
The pipe at the junction between the corner floor and the common drain pipe is broken, and even if you don't use water, the upstairs drainage will also be affected. The floor can be plugged with cement mortar + waterproofing agent.
It's very simple, you are equipped with the kind of protector that only has leakage, this protection device is only useful for leakage, you accidentally broke the line when you burned the fire, but it was a short circuit, and or the two were not grounded and leaked, so they did not jump. It is recommended to install a gate knife or replace a 2-in-1 leakage protector that can start a short circuit, which is very cheap, about 20 yuan.
Telecom companies will definitely say that there is no impact, and they will come up with a lot of security statements from official agencies, but they do have an impact, but the people cannot prove it.
You can add a partition between the kitchen and the living room.
Hang a beaded curtain on the study door.